Too Much Screen Time:  Is it bad for kids?

Children and their phones, iPads and gaming devices are inseparable today. Most are growing up with a wide selection of electronic devices at their fingertips. They can’t imagine a world without the internet, smartphones and tablets.  Although, all that reading and playing games on their handheld devices may be harmful.  But it’s not just kids who are getting too much screen time. Many parents struggle with over use of screen time themselves.  So it’s important to understand how too much screen time could be harming everyone in the family.

Children can experience at least one of the following symptoms after being exposed to more than two hours of screen time per day:

  • Headaches
  • Neck/shoulder pain
  • Eye strain, dry or irritated eyes
  • Reduced attention span
  • Poor behavior
  • Irritability

Any of these symptoms could potentially affect academic performance and social interactions.

The worldwide rapid rise of nearsightedness has been linked to increased use of and exposure to electronic devices. However, spending more time outdoors, especially in early childhood, can decrease the progression of nearsightedness.

Blue Light can be harmful

The LED screens of computers and portable digital devices emit a broad spectrum of visible light. Most of these light rays are harmless, but a portion of the light emitted by these screens is relatively high-energy visible light called “blue light.”

Blue light has shorter wavelengths and higher energy than other visible light rays. Some laboratory research suggests certain bands of blue light may be harmful to the light-sensitive retina of the eye over time.

Blue light also plays an important role in regulating our body’s circadian rhythm. This basically is an internal clock that’s running in our brain and cycles between alertness and sleepiness at regular intervals over a 24-hour period.

Too much exposure to blue light at the wrong time of day can disrupt a person’s normal sleep/wake cycle, which can have serious health consequences.  Sleep disruption can be especially problematic for children, leading to daytime drowsiness and poor performance in school. Some authorities feel that disruption of the sleep/wake cycle also can eventually lead to weight gain and obesity-related health problems.

Research has shown that people who experience disrupted 24-hour cycles of sleep and activity also are more likely to have mood disorders, lower levels of happiness and greater feelings of loneliness.

How to cut back on screen time

  • Set a limit on daily screen time. Make it clear to your kids and stick to it.
  • Encourage your child to spend some of that screen-free time outdoors while it is still light.
  • Establish screen-free zones: For example, no smartphone use for anyone in the family in the car,  at restaurants, or at the dinner table.
  • No screens in the bedroom when it is time for bed. No exceptions.
  • As parents you can be a model for moderate screen use. Show your children, with your own behavior, how to live a rich, varied and healthy life where all habits are practiced in moderation.

It is also very important to teach your child good eye habits, below are few tips from experts:

  • You can set a kitchen timer or a smart device timer to remind them.
  • Alternate reading an e-book with a real book and encourage kids to look up and out the window every two chapters.
  • After completing a level in a video game, look out the window for 20 seconds.
  • Pre-mark books with a paperclip every few chapters to remind your child to look up. On an e-book, use the “bookmark” function for the same effect.
  • Avoid using a computer outside or in brightly lit areas, as the glare on the screen can create eye strain.
  • Adjust the brightness and contrast of your computer screen so that it feels comfortable to you.
  • Use good posture when using a computer and when reading.
  • Encourage your child to hold digital media farther away, 18 to 24 inches is ideal.
  • Create a distraction that causes your child to look up every now and then.
  • Remind them to blink when watching a screen.

Finally, it is very important to make sure your child gets a regular eye exam by a pediatric ophthalmologist or optometrist.  This will help monitor your child’s vision and eye health.

Keep Your Eyes Comfortable During the Cold Winter Months

Harsh weather conditions can reduce the natural moisture in your eyes and the irritation usually results in a burning or itching sensation that often leads to rubbing or scratching your eyes which can worsen the symptoms. Sometimes it feels like there is a foreign object in your eye and for some, dry eyes can even cause excessive tearing, as your eyes try to overcompensate for their lack of protective tears. Prolonged, untreated dry eyes can lead to blurred vision as well. Between the harsh winter winds outside and the dry heat radiating inside, our eyes are very quickly irritated and dried in the winter months.  The result is itchy, dry eyes that may cause pain, blurred vision, a burning sensation, or even watery vision as our eyes try to compensate for the dryness.

What Are The Symptoms?

  • Uncomfortable, stingy, burning or scratchy feeling.
  • Stringy mucus in or around your eyes
  • Increased eye irritation from smoke or wind
  • Eye fatigue
  • Sensitivity to light
  • Eye redness
  • A sensation of having something in your eyes
  • Difficulty wearing contact lenses
  • Periods of excessive tearing
  • Blurred vision, often worsening at the end of the day or after focusing for a prolonged period

10 TIPS TO KEEP YOUR EYES COMFORTABLE DURING THE WINTER MONTHS

Whatever the symptoms, dry eyes can cause significant discomfort during the long winters and relief can seriously improve your quality of life.

  1. To keep eyes moist, apply artificial tears/eye drops a few times a day. If you have chronic dry eyes, speak to your eye doctor about the best product for your condition.
  2. Drink a lot of fluids – keeping your body hydrated will also help maintain the moisture in your eyes.
  3. If you spend a lot of time indoors in heated environments, use a humidifier to add some moisture back into the air.
  4. Try to situate yourself away from sources of heat, especially if they are blowing. While a nice cozy fire can add to the perfect winter evening, make sure to keep your distance so dry eyes don’t ruin it. 
  5. Staring at a computer or digital device for extended amounts of time can further dry out your eyes. If you spend a lot of time staring at the screen, make sure you blink often and practice the 20/20/20 rule – every 20 minutes, look 20 feet away for 20 seconds. Use artificial tears often to lubricate eyes during long periods of using your eyes.
  6. Avoid air blowing in your eyes. Don’t direct hair dryers, car heaters, air conditioners or fans toward your eyes. In your car, direct heat to floor vents and away from your eyes once your windshield is defrosted.
  7. Stop smoking and avoid smoky environments.
  8. Don’t rub your eyes! This will only increase irritation and can also lead to infections if your hands are not clean.
  9. Give your eyes a break and break out your glasses. If your contact lenses are causing further irritation, take a break and wear your glasses for a few hours or days. Also talk to your optometrist about switching to contacts that are better for dry eyes.
  10. Protect your eyes. If you know you are going to be venturing into harsh weather conditions, such as extreme cold or wind, make sure you wear protection. Try large, 100% UV protective eyeglasses and a hat with a visor to keep the wind and particles from getting near your eyes. If you are a winter sports enthusiast, make sure you wear well-fitted ski goggles.

If you find that after following these tips you continue to suffer, contact your eye doctor.

Beware of Costume Contacts

Costume Contact Lenses such as cat eyes or zombie may make your Halloween costume a bit more frightful although wearing those lenses without a prescription can be more terrifying, as it could result in vision loss or even blindness.

You can buy contact lenses, including decorative contact lenses, from your eye doctor or on the Internet.  It’s very important that you only buy contact lenses from a company that sells FDA-cleared or approved contact lenses and requires you to provide a prescription.  Even if you don’t wear corrective lenses you still need to get fitted properly.

Remember — Buying contact lenses without a prescription is dangerous!

Right now there are a lot of products that you can buy without a prescription but they may not be safe or legal.

You should NEVER buy lenses from:

  • street vendors
  • salons or beauty supply stores
  • boutiques
  • flea markets
  • novelty stores
  • Halloween stores
  • convenience stores
  • beach shops
  • internet sites that do not require a prescription

Know the Risks –

Wearing costume contact lenses can be risky, just like the contact lenses that correct your vision. Wearing any kind of contact lenses, including costume lenses, can cause serious damage to your eyes if the lenses are obtained without a prescription or not used correctly.

These risks include:

  • A cut or scratch on the top layer of your eyeball (Corneal Abrasion)
  • Allergic reactions like itchy, watery red eyes
  • Decreased vision
  • Infection
  • Blindness

Signs of possible eye infection:

  • Redness
  • Pain in the eye(s) that doesn’t go away after a short period of time
  • Decreased vision

If you have any of these signs, you need to see a licensed eye doctor (optometrist or ophthalmologist) right away!  An eye infection could become serious and cause you to become blind if it is not treated.

This Halloween season DEF wants to remind you of the importance of eye safety and to make sure to take the proper steps in ensuring the proper contact lenses. 

A New Commitment to Vision

Meet Tom Sullivan – DEF’s Ambassador of Vision

Over the last 40 years, I’ve been committed to working on behalf of blind children and their families.  My involvement has spanned the entire gamut of participation – from direct involvement in the classroom and counseling parents to hosting organized 10K races and celebrity golf tournaments that carried my name.  In that time, my wife and I raised just over $8 million thanks to the generosity of so many people.  Though my commitment to this cause has not changed, I’ve chosen to take on a new challenge that has in every way re-energized my passion. 

I’ve recently become the Ambassador of Vision for the Discovery Eye Foundation (DEF), a remarkable organization that funds cutting edge research that I believe someday will eliminate many forms of blindness.  The principle reason for my enthusiastic commitment is largely due to the fact that DEF directly funds researchers and avoids institutional restrictions.

As of this blog, DEF is engaged in ongoing efforts to understand 5 main eye diseases – Retinitis Pigmentosa, Macular Degeneration, Keratoconus, Diabetic Retinopathy, and Glaucoma.  I can honestly tell you that breakthroughs are not only on the horizon, but in many cases they are imminent.  Over the weeks and months I’ll be telling you much more, specifically about our individual research projects.  

Any help you may choose to give on behalf of people struggling with vision loss will be deeply appreciated. I look forward to having many of you join my fight for sight. Your help can make a difference! Click here to donate.

 

Tom Sullivan
DEF’s Ambassador of Vision
sullivanvision.com

 

 

Chlorine & Your Eyes

Summer time is officially here and everyone enjoys a dip in a nice, cool pool during the summer months.  While swimming is a great form of exercise and a relaxing way to cool down, the water can be hard on your eyes.

What Chlorine Does to Your Eyes –

Yes chlorine can make your eyes red!  But the real dangers in pool water aren’t just a result of your eyes coming in contact with the chemical. The redness and discomfort that sometimes accompany swimming can be caused by bacteria that linger in the water. When submerged in chlorine-treated water, your eyes lose the tear film that protects against infection.  Even though the purpose of chlorine in pools is to reduce the amount of harmful bugs, some contaminants are resistant to the chlorine that is used. This means the health of your eyes can be compromised with infections caused by bugs still lingering in the water.  

This can result in these three common eye issues:

  • Pink eye or conjunctivitis – This is one of the most common eye infections swimmers can get, as it can be either viral or bacterial and spreads quickly and easily through the water.
  • Red, irritated eyes –  This is a result of your eyes becoming dehydrated due to the chlorine and the removal of your tear film. Sometimes you may also experience blurriness and distorted vision, this is usually only temporary.
  • Acanthamoebic keratitis – This is a severe eye infection that is caused by amoeba in the water becoming trapped between the cornea and the contact lens. It can begin to live there, which can result in ulcers on your cornea and permanent damage to your vision.

 

Swimming with Contact Lenses  

Wearing contact lenses in any type of water—including a pool, hot tub, ocean or lake—puts you at higher risk for a corneal infection. Bacteria and other microbes can grow on the lenses even after just one swim. Because contact lenses sit on your eyes for an extended period of time, your eyes are then continuously exposed to chemicals, bacteria, fungi or parasites after you swim. That can lead to a painful infection, corneal damage, and even loss of vision.

To avoid any kind of infection, remove contacts altogether when swimming or use swim goggles. You can get prescription swimming goggles to help keep your vision clear and eyes healthy in the pool. Talk with your eye care provider for more information about the different kinds of swim goggles available.

If you have any of these eye infection symptoms are increasing one hour or longer after swimming, see your eye doctor right away.

Redness
Pain
Tearing
Being very sensitive to light
Blurry vision
Sensation of having something in your eye
Discharge from your eye
Eye swelling
 

With all of these risks to your eyes from chlorine, swimming might seem a bit scarier than before. However, there is no need to panic!  By taking a few safety measures, you can protect your eyes and still enjoy your time in the pool.

 

  • Wear Goggles – Wear a pair of swim goggles every time you swim. Goggles keep pool chemicals out of your eyes.

 

 

 

 

  • Wash Your Eyes – Immediately after swimming, splash your closed eyes with fresh tap water.  This washes chlorine and other chemicals off your eyelids and eyelashes.

 

 

 

  • Use Eye Drops – Use over-the-counter lubricating eye drops before and after swimming to keep the tear film balanced and eyes comfortable.

 

 

  • or Use Gel Tears – If you have dry eye, thicker artificial tears called gel tears will help protect your tear film, use these drops before putting on your goggles.

 

 

  • Stay Hydrated – Don’t forget to drink plenty of water. Staying well hydrated is an important part of keeping your eyes moist and comfortable.

 

 

Don’t miss out on the fun this summer! By taking these easy steps whenever you decide to take a dive, you can have peace of mind that your eyes and your vision are protected.

 

 

April is Sports Eye Safety Month

Basketball, Baseball and Air/Paintball Guns Top the List of Leading Causes of Eye Injuries

More than 40 percent of eye injuries that occur every year are related to sports or recreational activities. A recent study found that about 30,000 people in the U.S. went to an emergency department with a sports-related eye injury, a substantially higher estimate than previously reported. Three sports accounted for almost half of all injuries: basketball, baseball and air/paintball guns. 

Basketball was the leading cause of injury in males, followed by baseball/softball, and air/paintball guns. Baseball or softball was the leading cause among females, followed by cycling and soccer.

In support of Sports Eye Safety Month in April, we are offering athletes of all ages guidance on how to protect their eyes.

Sports-related injuries can range from corneal abrasions and bruises on the lids to more serious, vision-threatening internal injuries, such as a retinal detachment and internal bleeding. About one-third of sports related eye injuries happen to kids.

The good news is that simply wearing protective eyewear can prevent about 90 percent of eye injuries. Follow these tips to save your vision:

  • Wear the right eye protection: For basketball, racquet sports, soccer and field hockey, wear protection with shatterproof polycarbonate lenses.
  • Put your helmet on: For baseball, ice hockey and lacrosse, wear a helmet with a polycarbonate face mask or wire shield.
  • Know the standards: Choose eye protection that meets American Society of Testing and Materials (ASTM) standards. See the Academy’s protective eyewear webpage for more details.
  • Throw out old gear: Eye protection should be replaced when damaged or yellowed with age. Wear and tear may cause them to become weak and lose effectiveness.
  • Glasses won’t cut it: Regular prescription glasses may shatter when hit by flying objects. If you wear glasses, try sports goggles on top to protect your eyes and your frames.

Virtually all sports eye injuries could be prevented by wearing proper eye protection. That is why athletes are encouraged to protect their eyes when participating in competitive sports.

Anyone who experiences a sports eye injury should immediately visit an ophthalmologist, a physician specializing in medical and surgical eye care.

 


Back to School – Why Eye Exams are Important!

Summer is almost over and it’s back to school season. As parents, many of us are busy ensuring our kids are ready and prepared for the new year; worrying about school supplies, new clothes, and new haircuts. There is always a long list of things to do before school starts. But something that often gets overlooked is getting your child’s eyes examined annually.

Early eye examinations are crucial to make sure children have normal, healthy vision so they can perform better at schoolwork and play. Early identification of a child’s vision problem can be crucial because children often are more responsive to treatment when problems are diagnosed early.

Early eye exams also are important because children need the following basic skills related to good eyesight for learning:

  • Near vision

  • Distance vision

  • Binocular (two eyes) coordination

  • Eye movement skills

  • Focusing skills

  • Peripheral awareness

  • Hand-eye coordination

Parents also need to be alert for the presence of vision problems such as ‘crossed’ eyes or ‘lazy’ eye. These conditions can develop at a young age. ‘Crossed’ eyes or strabismus involves one or both eyes turning inward (towards the nose) or outward. Amblyopia, known as ‘lazy’ eye, is a lack of clear vision in one eye, which can’t be fully corrected with eyeglasses. ‘Lazy’ eye often develops as a result of ‘crossed’ eyes, but may occur without noticeable signs. Lazy eye can be treated if caught early.

In addition, parents should watch their child for indication of any delays in development, which may signal the presence of a vision problem. Difficulty with recognition of colors, shapes, letters and numbers can occur if there is a vision problem. Children generally will not voice complaints about their eyes, therefore parents should watch for signs that may indicate a vision problem, including:

  • Sitting close to the TV or holding a book too close

  • Squinting

  • Tilting their head

  • Constant eye rubbing

  • Extreme light sensitivity

  • Poor focusing

  • Poor visual tracking (following an object)

  • Abnormal alignment or movement of the eyes (after 6 months of age)

  • Chronic redness of the eyes

  • Chronic tearing of the eyes

  • A white pupil instead of black

Scheduling Eye Exams for Your Child

If eye problems are suspected during routine physical examinations, a referral should be made to an eye doctor for further evaluation. Eye doctors have specific equipment and training to assist them with spotting potential vision problems in children.

When scheduling an eye exam for your child, choose a time when he or she usually is alert and happy.

Glasses and Contacts

Keep these tips in mind for kids who wear glasses:

  • Plastic frames are best for children younger than 2.

  • Let kids pick their own frames.

  • If older kids wear metal frames, make sure they have spring hinges, which are more durable.

  • An elastic strap attached to the glasses will help keep them in place for active toddlers.

  • Kids with severe eye problems may need special lenses called high-index lenses, which are thinner and lighter than plastic lenses.

  • Polycarbonate lenses are best for all kids, especially those who play sports. Polycarbonate is a tough, shatterproof, clear thermoplastic used to make thin, light lenses. However, although they’re very impact-resistant, these lenses scratch more easily than plastic lenses.

  • Your eye doctor can help you decide what type of vision correction is best for your child.

Specialists state that 80% of what your youngster learns in school is taught visually. Untreated vision troubles can put children at a substantial disadvantage. Be certain to arrange that your child has a complete eye exam before school starts.

View Video

Issues That Could Affect Your Child’s Vision

boy-with-glassesVision loss is feared more than the loss of any other sense and is considered to affect the quality of life more than most other issues. When it comes to children, even partial vision loss can be damaging because it can affect the way that your child learns and develops. There are several different types of issues that may affect your child’s vision. Awareness is key to prevention and treatment.

Refractive Errors

Refractive errors such as nearsightedness, farsightedness, and astigmatism are the most common types of issues that affect children’s vision. Since children are working to constantly adapt to their surroundings, they may not realize that they have a vision problem and the issue may manifest as an inability to focus, chronic headaches, or poor eye-hand coordination. In most cases, these issues can be corrected with glasses or contacts, but extreme cases may require surgery.

Alignment Disorders

Alignment disorders are generally more obvious than other types of issues. One eye may drift to the side, an eyelid may droop, or the surface of an eye may appear cloudy, affecting the vision. In some cases, however, the condition may be intermittent, so it is important to continually look for these symptoms and alert an eye doctor to any concerns. Alignment disorders may be corrected with surgery, an eye patch, eye drops, or a combination depending on the cause.

Pediatric Retinoblastoma

Pediatric retinoblastoma is a type of kid’s eye cancer that usually affects children under six years of age. About 95 percent of children diagnosed in the US are able to be treated successfully and a majority of these children retain most or all of their sight. The prognosis for retinoblastoma improves greatly with early diagnosis and treatment. One of the most common warning signs that you can look for is a white glare on the pupil when it is directly exposed to light.

Diseases and Infections

Diseases and infections such as conjunctivitis, styes, and blocked tear ducts are usually minor problems that are easily resolved. However, these issues may develop into larger problems that affect the vision if care is not taken. Conjunctivitis may resolve on its own depending on the cause, but the child should be kept away from others during the healing process to avoid infecting others or being exposed to other contaminants while the eye is sensitive.

Blocked tear ducts may be opened up using massage techniques recommended by a pediatrician or ophthalalmogist. Allowing the eyes to dry out may be dangerous for the vision, so drops may be needed to keep the eye moist while the tear ducts are blocked. Styes are caused by an infection in the eyelash follicle, so it is important to keep the area clean so that the infection can clear without causing damage.

By working to spot potential issues, you can help to preserve your child’s eye health and vision.

 

amanda-duffyAmanda Duffy
Freelance blogger

Pink Eye Tips and Prevention

pink eye
Pink eye is an inflammation or infection of the thin, clear covering of the white of your eyeball (the conjunctiva) and the inside of your eyelids. When the small blood vessels in the conjunctiva become inflamed they are more visible making the whites of your eye to appear pink. Also called conjunctivitis, it can affect one or both eyes.

Common symptoms of pink eye include:

  • Redness in the white of the eyeball(s) and or inner eye lid(s)
  • Increased tearing or discharge
  • Slightly blurred vision from discharge
  • Crusting of the eyelashes from the discharge that may prevent eyes from opening after sleep
  • Mild eyelid swelling
  • Itching or burning sensation
  • Increased sensitivity to light
  • Irritation or gritty feeling in your eye(s)

Make an appointment with your eye doctor if you notice and of the symptoms of pink eye. Some forms are highly contagious for as long as two weeks, so an early diagnosis could protect those around you from contacting the disease. If you were contact lenses, stop using them until directed by your doctor.

There are four general types of pink eye.

Allergic Conjunctivitis
This form is caused by eye irritants such as pollen, dust, animal dander and other environmental factors. It is not contagious. Treatment often includes applying a cool compress to your eyes and using allergy eye drops and artificial tears. In severe cases non-steroidal and anti-inflammatory medications may be prescribed.

Bacterial Conjunctivitis
This type is most often caused by staphylococcal or streptococcal bacteria, is highly contagious and can cause serious damage to the eye if left untreated. This is treated with antibiotic eye drops or ointments to speed up the healing process that can take one to two weeks. While you may see improvement after three to four days, the entire course of treatment needs to be used to prevent a recurrence.

Because this is so highly contagious here are a few things to remember so you don’t spread it to others or re-infect yourself:

  • Don’t touch your eye with your hands
  • Wash your hands frequently and thoroughly
  • Change towels and washcloths daily – and don’t share them
  • Change pillowcases often
  • Get rid of all eye cosmetics and personal care items such as eye creams – and don’t share them
  • Avoid swimming
  • Don’t reuse tissues when wiping your eyes, and throw them out immediately
  • Follow your eye doctor’s instructions related to your contact lens usage and care

Viral Conjunctivitis
This is the same type of virus associated with the common cold. Antibiotics will not work on a viral infection. Like a cold, the infection just needs to run its course which could take anywhere from a few days up to 2-3 weeks. It is also contagious like a cold, so follow the same instructions as listed above to not spread the infection.

Chemical Conjunctivitis
This can be caused by irritants like air pollutions, chorine in swimming pools or exposure to noxious chemicals. To treat this type of pink eye requires a doctor to carefully flush your eyes with saline and may require topical steroids. Acute chemical injuries are very serious and need prompt medical attention to avoid corneal scarring, intraocular damage, vision loss or the loss of an eye.

Of course the best way to deal with pink eye is not to get it. Here are some ways to protect yourself and others.
pink eye

2/24/16

Susan DeRemerSusan DeRemer, CFRE
Vice President of Development
Discovery Eye Foundation

Accommodative Esotropia

This article is reprinted with the permission of Dr. Kenneth W. Wright, Medical Director of the Wright Foundation for Pediatric Ophthalmology & Strabismus. Check out his website for information on over 20 pediatric eye disease and conditions.
Accommodative Esotropia

Normal Binocular Vision

Normally, both eyes are aligned on the same visual target and the images from each eye are merged in the brain to form a single three-dimensional image, or binocular vision. The brain’s process of merging or “fusing” images from each eye into one image is called binocular fusion. The perception of three-dimensional depth is called stereoscopic vision. Stereoscopic vision is the highest level of binocular vision and requires intricate processing of information from both eyes. Binocular vision develops during early infancy, and proper alignment during this time is necessary for normal binocular development to occur.

Accommodative Esotropia

Esotropia means one eye is turned in towards the nose, or crossed eyes. Patients with esotropia have one eye aligned on the visual target, but the other eye is turned in towards the nose. When the eyes are crossed only one eye is aligned with the target and the child is forced to use only one eye for vision. Accommodative esotropia is a type of esotropia caused by significant farsightedness (hypermetropia). Most think that farsighted people can see well only in the distance. In children, this is not true. Children have the ability to focus great amounts, so most children can see well for distance and near even without glasses. Focusing (medically termed accommodation) is the process of increasing the lens power of the eye to see clearly. Linked to focusing is the natural reflex of convergence (eyes move in). As one focuses on an approaching near object, the eyes move in to stay on target. This process of focusing and convergence used for near vision is termed the near reflex. Accommodative esotropia occurs because the farsighted child has to over focus to see clearly. When eyes over focus, the natural reflex is for the eyes to cross. You can experience this by trying to see the tip of your nose. When you look at the tip of your nose you have to over focus and consequently your eyes cross. Since more focusing is needed to see near objects, the crossing tends to be greater when looking at close objects.

Accommodative Esotropia eye turns
Right eye turns in because patient is farsighted and not wearing glasses.
Accommodative Esotropia corrected
Eyes are in excellent alignment after prescribing glasses.
 
 
 
 
 
 
 
 
The onset of accommodative esotropia is most commonly seen between the ages of 2 and 4; however, even infants can have crossed eyes. This situation is usually first noticed when the child is tired, sick, or looking at an object very near to their face. Some children cross when they are tired and this is because they cannot sustain the effort to keep the eyes straight. The crossing is usually intermittent at first, but can quickly become constant. There may be a parent or a close relative with the same problem; however, in many cases there is no family history of crossed eyes.

During the examination, three important determinations are necessary. The first determination is to make sure the vision is normal in each eye. This is done by assessing the visual behavior of the preverbal child, or simply having the verbal child read the eye chart. Secondly, the amount of crossing is evaluated. This is measured using prisms while the child is viewing an object. Thirdly, the need for glasses is measured, and this requires drops to dilate the pupil and relax the child’s focusing. These drops take approximately 20 to 30 minutes to work and will blur vision for 1 to 3 hours, but the pupil may stay large for much longer. After the eyes have been dilated, the eyeglass prescription is calculated using a special light (retinoscope) along with lenses. Determining the proper lens power in young children is difficult and may require repeat exams and changes in the eyeglass lenses.

Effects of Esotropia on Visual Development

Esotropia occurring in young children and infants results in the immature brain turning off the information from the deviated eye. This mechanism of turning off visual areas of the brain connected to the deviated eye is called “suppression.” Thus, patients with esotropia use one eye at a time (monocular vision) and do not have binocular fusion or stereoscopic vision. Suppression disrupts normal binocular visual development and if not treated early, causes permanent loss of binocular vision and stereoscopic vision. Early treatment of esotropia is critical to stimulate binocular development.

How Do Patients with Esotropia See?

If the esotropia is acquired in late childhood (after 7 to 9 years of age) or in adulthood, it will cause double vision. Esotropia occurring in infants and young children, however, does not cause double vision, as the young, immature brain has the ability to suppress the information from the deviated eye. The child uses one eye at a time to see and avoids double vision. The fact that the eyes are crossed disrupts normal binocular visual development and often causes permanent loss of binocular vision and stereoscopic vision. Early treatment of esotropia is critical in order to stimulate binocular development.

Treatment of Accommodative Esotropia

Glasses

The goal of treatment is to align the eyes, stimulating them to work together to establish binocular vision and stereoscopic vision. Children and infants who are significantly farsighted are best treated with glasses. If the glasses align the eyes, then surgery is not necessary, and the treatment is to continue with the glasses. The full, hypermetropic (farsighted) prescription is usually given via eyeglasses, and most parents are surprised at how well these children adjust to the glasses. When properly worn, most children adapt to the glasses like “fish to water.” The glasses not only straighten the eyes, but also relax the child’s vision, as they no longer have to over focus. In patients with accommodative esotropia, glasses must be worn full-time. Older children over 4 to 5 years may have blurred distance vision when they first put on their glasses. This is because they had a strong habit of over-focusing and continue to do so even when wearing the glasses. Over several days, most children will relax their over-focusing and enjoy the comfort the glasses afford. In those children who do not adapt to the glasses, drops can be used to relax focusing, or a reduced prescription power can be given. In most cases, however, the best treatment is to give the full power. The eyes usually straighten within a few days to a few weeks after wearing the glasses. If the eyes are still crossing with the glasses and the child is not using the eyes together after several weeks, then eye muscle surgery is usually required. Occasionally, an initial response to glasses is that the eyes “break down” and cross for distance and near. In this situation, surgery in addition to the glasses may be required.

Bifocal Glasses

In certain children, glasses will align the eyes for distance viewing, but the eyes will still cross for near work. These patients can be helped with bifocal glasses. A bifocal is a small powerful lens placed in the lower part of the eyeglass lens. This more powerful lens will further relax near focusing to straighten the eyes for near work. Chin-up posturing for near work indicates that the child is using the bifocals correctly and is viewing through the bifocal lens for near work.

Amblyopia

Some children with crossed eyes have a strong fixation preference for one eye (dominant eye) and constantly have one eye turned in. Constant use of only one eye can lead to vision loss of the deviated, or non-dominant, eye. Poor vision occurs as visual areas in the brain connect with the dominant eye and are then subsequently suppressed. If left untreated, the deviated eye will progressively lose vision over time. This poor vision caused by brain suppression is called amblyopia. Amblyopia occurs only in young children when the visual areas are immature and still developing. Children who have a difference in the strength of the glasses in one eye as compared to the other have an increased risk of developing amblyopia in the more farsighted eye. Approximately 20 to 40% of patients with esotropia will also have amblyopia of the non-preferred eye.

Patching

If amblyopia is present, patching of the good eye is indicated to promote visual stimulation of the amblyopic eye and improve vision. Patching does not straighten the eyes and is not indicated if vision is equal. Another way to promote stimulation of the amblyopic eye is to blur the vision of the “good eye.” This can be done by placing a blurring lens over the good eye, or by administering drops to blur the good eye. In most cases, patching the good eye with an adhesive patch is the most practical treatment. Patching is continued until vision improves in the weaker eye, usually taking a few weeks to several months. In the vast majority of patients, vision can be improved if the parents and child are compliant with the treatment.

10/8/15

Dr. Kenneth WrightKenneth W. Wright, MD
Medical Director, Wright Foundation for Pediatric Ophthalmology & Strabismus
Clinical Professor of Ophthalmology, USC Keck School of Medicine