OUR EYES WORK LIKE CAMERA’S!

The inner workings of the human eye are complex, but at the same time, fascinating. Have you wondered how exactly they do work or what are the major parts of the eyeball involved in creating vision? Let’s find out.

These tiny cameras spend every day processing millions of pieces of information at lightning fast speeds, and turn them into the simple images we see almost instantly.

In reality, this process is anything but simple. The eye has several distinct parts, each of which has specific responsibilities that work together like a machine.

The eyeball is just like a camera. In fact, human eyes are part of a classification known as “camera-type eyes.” And just like a camera, it can’t function without the presence of light.  As light hits the eyes, it’s focused by the eye in a way similar to a camera lens. This process allows the images we see to appear clear and sharp rather than blurry.

There are specific parts of the eye that make this focusing process possible. Each beam of light that hits the eye goes through a series of steps:

Step 1: Light passes through a thin layer of moisture

Step 2: Light hits the cornea.  The cornea is transparent, and is the first layer to begin focusing light within the eye. The cornea is connected to the sclera, which is a tough fiber on the outside of the eye that acts as protection.

Step 3: Behind the cornea is another liquid layer known as the aqueous humor, and its job is to maintain pressure levels in the front of the eye as light is passing through.

Step 4: Once light has passed through the aqueous humor, it has finally reached the pupil. The pupil is the round entryway of the colored iris.

Step 5: Once the pupil determines how much light it will let inside your eye, the job passes to the lens. The lens factors in the amount of light the pupil lets in, and figures out how far away you are from the object that the light is reflecting off of, or the object you’re trying to see. From there, the lens focuses your image into an accurate view of what you’re looking at. Part of this process is controlled by muscles in the lens called ciliary muscles, which expand and contract to pull on the lens and allow it to focus properly.

Step 6: As light reaches the center of the eye passes through another layer of moisture, called the vitreous, or vitreous humor. Then, it reaches the final stop in the process: The Retina.

The retina is the back of the eye. If the lens in your eye is most like a camera, the retina is most like its film – this is where the final product is projected. The retina has several parts:

  • Macula: The center of the retina. The center point of the macula is called the fovea, and it has the most photoreceptors and nerve endings of any part of the eye.
  • Photoreceptors: Split into two designations – rods and cones.
    • Cones are in the macula. When there is bright light, cones provide clear, sharp central vision and detect colors and fine details.
    • Rods are located outside the macula and extend all the way to the outer edge of the retina. They provide peripheral or side vision. Rods also allow the eyes to detect motion and help us see in dim light and at night.

  • Retinal pigment epithelium: Abbreviated RPE, this is a tissue layer below the rods and cones which absorbs any extra, unneeded light.
  • Choroid: The choroid is behind the retina, and is in charge of making sure the retina and RPE have enough nutrition flowing from small blood vessels.

Once the photoreceptors have converted light into an electronic signal, they send a signal to the brain’s visual command center and you have vision. It’s amazing what even small parts of our bodies can do.

 

How the Eye Works

January is Glaucoma Awareness Month

National Glaucoma Awareness Month reminds all of us to get regular eye exams and show support for those suffering from this condition.  Glaucoma is one of the leading causes of vision loss and blindness.  Glaucoma is often called “the sneak thief of sight” because glaucoma has few symptoms or warning signs in its early stages. It can be diagnosed only by a full eye exam by an eye care practitioner.

Glaucoma is a disease where pressure builds up and damages the eye’s optic nerve. Types of this disease include the common Primary Open Angle Glaucoma, which causes peripheral eyesight to slowly diminish and is age-related. Angle Closure Glaucoma, where the fluid drainage system is narrow and closed so that the aqueous fluid remains in the front chamber of the eye and intraocular pressure rises; and Low Tension Glaucoma, where the optic nerve becomes damaged in spite of the intraocular pressures being within the normal range. There’s currently no way to restore vision lost from glaucoma because once the nerve cells become damaged, they do not regenerate.

 

A few important facts you should know about Glaucoma in adults:

  • More patients than ever are affected – Over 3 million people in the U.S. have glaucoma, and the number is rising.
  • Glaucoma can affect people of all ages – The most common form of glaucoma, Primary Open Angle Glaucoma, becomes more prevalent with increasing age. However, glaucoma can strike anyone, even infants and children but it is rare.
  • Demographics do play a role – Glaucoma is a leading cause of blindness among African Americans; it’s also highly prevalent in Hispanics over the age 65.
  • Is glaucoma hereditary? The risk of developing Primary Open–Angle Glaucoma is up to nine times more likely if parents or siblings have the disease.
  • Hope for future glaucoma patients – Although there is no cure for any form of glaucoma, early diagnosis and treatment help control the disease and slow the process of vision loss or blindness.

Newer Glaucoma Treatments 

Glaucoma treatment usually begins with the use of topical (eye drop) medications which lower the intraocular pressure. Within the past two years, two new topical medications have been approved for the treatment of glaucoma: VYZULTA® and Rhopressa®. VYZULTA® is a modification of a class of medications currently used to treat glaucoma – the prostaglandin analogs. This drug helps lower intraocular pressure by increasing the drainage of fluid (aqueous humor) from the eye.

Rhopressa® is part of a new class of drugs used to treat glaucoma called Rho kinase inhibitors. Rhopressa®, like VYZULTA®, also lowers intraocular pressure by increasing aqueous outflow. Both Rhopressa® and VYZULTA® are dosed once daily and pose few, if any, systemic safety concerns.
 

Laser

Using a laser to make a small opening in the iris to help with fluid drainage usually cures Angle-Closure Glaucoma.  This procedure is called a laser peripheral iridotomy.

For Primary Open Angel Glaucoma, when eye drops are not enough to reduce the pressure then a procedure called Selective Laser Trabeculoplasty (SLT) can be used. The SLT reduces intraocular pressure by stimulating increased outflow of fluid from the eye. SLT offers an improved safety profile compared to older glaucoma laser therapies and may lower eye pressure by as much as 20 to 30 percent. It is typically used as the next step in patients whose glaucoma is uncontrolled on medical therapy. Because of its excellent benefit-to-risk profile, however, SLT can sometimes be used in place of medications, especially in patients who have difficulty with their eye drops.
 

Surgery

When other treatments fail, there are many surgical therapies to lower the eye pressure. These surgical approaches, which are riskier than medical therapy or lasers, are usually employed when non-surgical means do not work well enough to stop vision loss.
 

MIGS

The goal of Minimally Invasive Glaucoma Surgery (MIGS) is to reduce intraocular pressure by enhancing the eye’s own internal aqueous humor drainage system. Some MIGS can be performed as stand-alone procedures, while others are typically done along with cataract surgery in patients with visually significant cataracts and mild to moderate glaucoma.

There are now a variety of recently FDA approved MIGS available for use in this country. MIGS typically are performed through a small incision in the eye with minimal tissue trauma and offer a favorable safety profile as well as more rapid visual recovery than traditional glaucoma surgery. There are many well qualified glaucoma specialists that perform the MIGS procedure.

 

Glaucoma Treatment Overview


 

National Glaucoma Awareness Month reminds all of us to get regular eye exams. Don’t let glaucoma steal your sight!  The best way to protect your sight is to get an annual comprehensive eye examination.

Thanks to funding from private philanthropists, DEF’s research continues to make great strides toward cures and treatment for glaucoma.  If you would like to support DEF’s sight saving research please donate today!

 DonateNow

September is Healthy Aging Month

Healthy Aging Month is an annual health observance designed to focus national attention on the positive aspects of growing older.  Aging is a process that brings many changes. Vision loss and blindness, however, do not have to be one of them. There are several simple steps you can take to help keep your eyes healthy for the rest of your life.

Eye diseases often have no early symptoms, but can be detected during a comprehensive dilated eye exam.  A comprehensive dilated eye exam is different from the basic eye exam or screening you have for glasses or contacts. By dilating the pupils and examining the back of the eyes, your eye care professional can detect eye diseases in their early stages, before vision loss occurs. By performing a comprehensive eye exam, your eye care professional can check for early signs of –

Here are some other tips to help maintain healthy vision and body now and as you age:

  • Eat a healthy, balanced diet. Loading up on fruits and vegetables can help keep your eyes healthy and disease free.
  • Maintain a healthy weight. Being overweight increases your risk for heart disease and diabetes. Complications from diabetes, such as diabetic retinopathy or glaucoma, can eventually lead to vision loss.
  • Don’t smoke. Smoking increases your risk for age-related macular degeneration, cataract, and other systemic diseases, including cancer. Wear protective eyewear when outdoors. Protecting your eyes from the sun’s ultraviolet rays when you are outdoors is important for your eye health. Choose sunglasses that block 99 to 100 percent of both UV-A and UV-B radiation.

Even if you are not experiencing vision problems, visiting an eye care professional regularly for a comprehensive dilated eye exam is the most important thing you can do to reduce your risk of vision loss as you age.

 

Download “Everyone’s vision can change with age”
A handout with explanation on how vision can change with age.

Children’s Eyes

It’s said that the “eyes are the windows to the soul.”  If that is true, looking into the eyes of a child, it’s easy to see the beauty and innocence that all of us wish could be more a part of the world they will live in.

I’ve also heard that there is a wonder found in those eyes – a curiosity that opens the child’s brain and heart to all of life’s joys and potentials. 

The thought that those eyes could be threatened through accident or disease is a painful reality that all of us at Discovery are working to prevent through all of our cutting-edge research with your on-going support.

All too often I have been present in an ophthalmologist’s office when a caring doctor is forced to tell a family that there is a major problem with their baby’s vision.  Diseases of the retina such as glaucoma, or retinitis pigmentosa, are joined by diseases of the cornea like keratoconus.  It’s even worse when a family has to hear the diagnosis is retinoblastoma – or a cancer of the eye.  In these personal and painful moments, a family’s entire life is forever changed and their child’s struggle with vision will remain on-going and difficult.

August is “Children’s Eye Safety” month, and I can’t think of anything else more important to protect.  The eyes of a child are beautiful, full of innocence and love.  So, let’s make sure that they will continue to see the world with beauty and clear vision. 

The Discovery Eye Foundation is committed to finding the answers that will preserve the vision of millions of people.  Our groundbreaking research needs your help to move forward! 

To learn how you can help, click here Ways to Help DEF or click the button below to donate online. 
DonateNow

Tom Sullivan
DEF’s Ambassador of Vision
sullivanvision.com

Cancer in the EYE: Unexpected Thought

When you think of cancer, most of us do not think about the eye or vision. Though rare, cancer can start inside or outside of the eye. If cancer starts inside the eyeball it’s called intraocular and if it starts outside the eye (eyelid or in the eye socket) then it’s called extraocular tumor. It can occur in both children and adults. Most major eye centers have specialists who are trained in the diagnosis and treatment of eye cancers.

Here are a few types of cancer in eye:

  • Eye Cancer in Children: The most common cancer seen in the eye of children is retinoblastoma. This occurs in children at very early age so these are the youngest cancer patients. This cancer starts inside the eye and affects the retinal cells. This is a cancer that presents very quietly, the child has no pain, no complaints and plays happily without any problem until one day parents notice that the pupil of the eye has some abnormal ‘White Glow’ (leukocoria) rather than the usual ‘red-eye’ reflection seen in a photo—that can be the first sign of retinoblastoma. So, it requires prompt evaluation by an ophthalmologist. Retinoblastoma is a curable cancer but if it is not treated on time, it can grow quickly and fill the eyeball. It can lead to loss of vision and life-threatening problems.

At the later stage of this cancer, the only one way to survive is to remove the eyeball (enucleation). Like many of other types of cancer, retinoblastoma has a genetic component so genetic testing needs to be done. The tumor begins with the RB1 gene mutation that stimulates retinal cells to develop into a tumor called a retinoblastoma. The RB1 mutation can be inherited from the parents, but in some cases it is sporadic and not inherited. There are various treatments such as surgery, chemotherapy, radiotherapy etc. to cure retinoblastoma cancer. Rarely it can spread beyond the eye. 

  • Eye Cancer in Adults: The development of a tumor in the back of the eye in adults can be from a metastatic cancer from elsewhere in the body or can arise in the eye itself. The most common primary eye cancer is called uveal melanoma and is a cluster of rapidly growing cells underneath the retina, which can lead to vision loss. The tumor can also appear as a dark black spot on the iris. Ideally the uveal melanoma can be treated when the tumor is still only in the eye.However, unfortunately, in approximately 50% of patients the uveal melanoma spreads (metastasis) to other part of the body, making it the most dangerous eye cancer in adults. Depending upon its location the uveal melanoma may not cause early symptoms but the patient may experience blurred vision or large numbers of floaters. The uveal melanoma can be diagnosed only when an ophthalmologist or eye care specialist examines your eye. What is the main cause of uveal melanoma? How it starts, grow and spread? These questions are still unanswered. The risk of this cancer increases in persons having fair skin (white), light eye color and inability to tan. There are certain changes in the genes linked to uveal melanoma. Currently the most common are GNAQ and BAP-1 gene mutations that are associated with greater risk of metastasis, where it spreads to other parts of the body. The standard treatment of this tumor is fine-needle aspiration biopsy (FNAB), brachytherapy (radioactive material inside a small capsule placed next to the tumor), radiation therapy and possibly enucleation. 
  • Metastasis to Eye: Finally, the other types of cancers found in the eyes are because of the spreading of a primary cancer (from a distant site such as the breast, lung or liver) to the eye.  Sometimes an eye exam can identify a metastatic tumor before the primary tumor is recognized elsewhere in the body.  Examples of cancers that spread to the eye are breast cancer in women and lung cancer in men. Less commonly, the prostate, kidney, gastrointestinal and blood cancers (leukemia and lymphomas) can spread to the eye.  Treatment depends on the type of cancer involved. 
  • Eye Damage from Chemotherapy: Eye problems can also develop through the side effects of chemotherapy or hormone therapies given for tumors outside the eye. When a person has any type of cancer, they often must undergo treatments with chemotherapeutic drugs.  A commonly used cancer drug is called cisplatin.  When treated with cisplatin, there can be damage to the retinal pigment epithelial cells in the inner part of the retina. Hemorrhages or bleeding can occur within the retina itself and vision can decrease temporarily. If a person is undergoing cancer treatments, it is a good idea to have their eyes checked, especially if they are having any vision problems. The chemotherapy does not actually cause cancers but only side effects.

Therefore, if you are having any decreased vision, it is always makes sense to have a good eye examination to identify any problems at early stage.

Kids and Sunglasses: Why it’s important!

Due to widespread awareness about the dangers of ultraviolet (UV) rays, most parents have been very cautious about protecting kids’ skin with sunblock, hats and clothing. However, what is usually overlooked is a good pair of sunglasses. 

Children are more susceptible to damage from UV exposure, which can penetrate deep into the eye and can increase the onset of eye problems in the future.  It’s really important we protect their vision, especially because kids spend lots of time outside and their eyes haven’t fully developed yet. More importantly, sunglasses may save their skin and eyes later in life by blocking the sun’s powerful UV rays.  Children under age 10 are at a high risk for skin and eye damage from UV exposure. The skin on their eyelids and around their eyes is more delicate and vulnerable than adult skin. 

UV ray damage builds over time, so the sooner you start protecting your children’s eyes from the sun, the lower their risk will be of ever developing future eye problems.

Here are a few tips to follow to help you find the right sunglasses for your kids:

  • UV Protection – Sunglasses for children should block 100% of UV radiation as well as between 75 – 90% of visible light. Any sunglasses you buy should have this information provided in the packaging 
  • Durability – Kids run, trip and fall. Their sunglasses should match this active lifestyle. Lenses should be made of a high impact material such as polycarbonate to prevent any breakages or scratches. Frames should be bendable but unbreakable. Make sure the glasses fit snugly, close to the face.
  • Spring hinges – Hinges that extend beyond 90 degrees and have a spring action to keep the fit of the frame snug will decrease the risk of your child’s sunglasses falling off or getting damaged during sports and other play.
  • Let them choose – You’re not the one who has to wear the glasses or hear other kids’ comments on them. Children and especially older kids/teens – are likelier to actually wear them if they select them themselves.
  • Fit & Comfort – Children’s sunglasses should offer good eye coverage and fit comfortably. Allow your child to try on various pairs to find something that is comfortable and fits correctly.
  • Set an Example – Kids at a young age look up to their parents so set a good example! Ensure you’re wearing your sunglasses every time you go outside if you want your child to do the same.

If your child has prescription sunglasses, be sure they are made with UV blocking clear lenses. You can get them a second pair with tinted polycarbonate lenses, or you can get photochromic lenses that change from light to dark to avoid having two pairs.

Sunglasses do not have to be expensive.  Many inexpensive children’s sunglasses provide excellent UV protection because they include polycarbonate lenses which blocks 100 percent of UV.

Beware because some cheap brands of sunglasses for children can include an unacceptable level of lead and usually are not durable or as high-quality as other sunglasses.

Start with an eye exam – because children’s eyes change so rapidly, make sure your child is seeing well.  Children who do not need vision correction should have an eye exam at least every two years.  Children who need glasses or contact lenses should have an eye exam annually or as recommended by your eye doctor.

 

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June is Cataract Awareness Month

I remember my father experiencing the removal of cataracts in the early 60’s, and being told by his Ophthalmologist that the recovery time would be weeks rather than days and a positive outcome was not guaranteed.  The truth is that surgery of any kind carries with it a certain amount of risk.  But now the removal of cataracts has become routine for thousands thanks to amazing technology and gifted eye surgeons.  To the doctor, the surgery might be considered routine.  But to the patient, when vision is at risk their concerns and real fears are not in any way routine.

A year ago at 96 years young, my friend and actress Betty White was worried about her vision.  She told me that she was having a great deal of difficulty reading scripts and that her eyes would tire with the strain of trying to see the pages.  Her ophthalmologist determined that the removal of cataracts was necessary and the surgery on the first eye was scheduled for the next Tuesday.  “Is it safe? she asked me.”  I assured my friend that the removal of cataracts was not something to be afraid of.  “It’s routine” I told her.  “Please don’t be frightened.” Betty’s surgery was completely successful.  In fact, she tells me she can read everything including the smallest print on any label.

At the Discovery Eye Foundation (DEF), we are committed to supporting research that we believe will make the treatment of many forms of vision loss far more predictable and successful. Whether it’s through the breakthroughs in surgery or the development of new drugs or the advancement in genetics or the use of stem-cells the major forms of vision loss are being greatly affected through the power of your contributions and the commitment of the gifted researchers DEF supports. 

Please know that the dollars you contribute to DEF will go directly into the hands of the researchers where they can do the most good.

All of us at the Discovery Eye Foundation thank you for your support and look forward to a time when most forms of blindness will no longer limit vision.

 

Tom Sullivan
DEF’s Ambassador of Vision
sullivanvision.com

Low Vision

Low vision is the term used to describe significant visual impairment that can’t be corrected fully with glasses, contact lenses, medication or eye surgery.  Low vision causes a person to be unable to accomplish some daily tasks due to sight impairments. Low vision occurs when an individual struggles with any of the following common activities:

  • Reading
  • Everyday tasks like personal grooming
  • Viewing photos
  • Recognizing faces

Millions of Americans experience a normal loss of vision as they get older and the number of individuals who develop vision problems due to health conditions is projected to continue to rise.

There are many things that can cause low vision, including:

A few simple approaches can be:

  • Getting an eye exam
  • Update your reading glasses
  • Use bright light for reading

If these do not work for you, ask your eye care professional for help or ask for a referral to a low vision specialist.

Low Vision Technology 

Individuals with eye disease related to age, or vision compromised due to injury, may benefit from the usage of low vision devices.

There are two primary categories for low vision devices: Magnifiers for viewing things and objects that are close to you (magnifying lenses or machines), and magnifiers used for viewing objects and images at a distance (telescopic lenses). Many lighted magnifiers for close objects improve readability by increasing illumination.  With the advances in technology, many low vision devices are available to provide multiple function (near and distance) magnification and visual aid.

Technology is advancing to meet the growing needs of people with low vision impairment. There are a number of products that can help individuals with low vision. While considering the correct vision enhancer, keep in mind a few objectives:

  • What is the visual ability of the individual? Low vision aids are created with different options for specific low vision needs.
  • What tasks will the visual enhancer be used for? Find out what each product is best used for to decide if it will meet the needs of the individual.
  • Is the device easy to use? The right device should be easy for you to use.
  • How much does it cost? The cost of low vision aids can vary depending on a number of factors.

Popular products include:

Portable magnifiers and lighted magnifiers- offer magnified reading on the go. Perfect for menus, shopping lists, label reading, and more, portable magnifiers can fit in your pocket, purse, or be worn on the belt for quick, easy use.

 

Wearable magnifiers – wearable technology is the future for those with low vision who live an active lifestyle.  Wearable options make it possible to see and take part in everyday tasks, such as reading and recognizing faces.

 

Transportable magnification screens– are perfect for close up viewing as well as distance viewing. These great viewers offer great flexibility, from watching TV to using the mirror image feature for self-viewing. There are APPS for smart phones that can be used to magnify reading material.

  

Desktop devices for reading books, bills or letters – these have large, bright screens. A reading table offers visual aid for reading books, optional computer connectivity and more. This family of portable magnification units offers up to 75x magnification.

 

 

Consult a Low Vision Specialist–Consider making an appointment with a trained low vision specialist if you have specialized needs. They are available in larger cities or can be found by contacting The Braille Institute or by an internet search. Talk with your low vision specialist to find out which is right for you and where you can find them.

In addition to low vision devices and good lighting, inexpensive non-optical adaptive aids can assist with routine daily activities. These devices include:

  • Large-print cookbooks
  • Large-numbered playing cards, clocks, telephones and watches
  • Electronic “talking” clocks, kitchen timers, thermometers, blood pressure meters and even pill bottles
  • Large felt-tip pens and wide-lined paper for writing notes
  • Color-coded pill boxes
  • Signature guides help in writing your signature in the correct place

Many of these items can be found at your local drugstore, discount store or bookstore. Your low vision specialist can recommend retail sources for non-optical adaptive aids.

Vision loss can definitely be alarming but learning how to adapt, with the aid of low-vision specialists, can result in continued independence.  As low vision aids are tools focused on helping with the physical aspect, it is also important to seek the help of a counselor for psychological counseling if needed or join a support group, that may provide the help you need. Finally, maintaining a social network and asking for help will enrich your life, and help maintain your independence and quality of life.

Resources:
www.enhancedvision.com
www.allaboutvision.com
www.nei.nih.gov
www.brailleinstitute.org
www.visionaware.org
www.aao.org
www.amd.org
www.californiaphones.org
 

 

 

 

 

 

IN MY MOTHER’S EYE

There is an old Irish ditty I often heard as a little boy.  It goes something like this:

“One bright and guiding light that taught me wrong from right I found in my mother’s eyes. Those baby tales she told of roads all paved with gold I found in my mother’s eyes”.

As a blind child there was so much I found in my mother’s eyes.  From as early as I can remember, she read me stories that spanned from Robert Lewis Stephenson’s adventures like “Treasure Island” to the book that always made both of us cry – “Black Beauty.”

As a teenager and young adult, her eyes made it possible for me to venture into the world knowing as she liked to say…”dressed to the nines.” And then, when I married my wife, Patty, my mother had strong opinions about the choice of tuxedo I should wear on our wedding day.  I can still remember hearing her talk about how much she loved to see the first smiles on the faces of our children, Blythe & Tom. 

As she grew older, it was her eyes that kept her connected to the world.  Every morning, she read her Boston Globe from cover to cover, and on afternoon television she never missed her Soap Operas – “The Guiding Light,” and “Search for Tomorrow.” And then, there was the NBC Nightly News with her on-going crush on Tom Brokaw.

April is Women’s Eye Health Month along with celebrating the need for Sports Eye Safety.  I can still remember my mother crying when she watched Cleveland Indian’s left-handed pitcher Herb Score hit with a line-drive costing him his sight.  Research goes hand in hand with eye-safety to preserve vision.  The Discovery Eye Foundation is committed to finding the answers that will preserve vision and allow women and mothers the blessing of seeing the smiles on the faces of the children they love.

 

Tom Sullivan
DEF’s Ambassador of Vision
sullivanvision.com

LUTEIN AND ZEAXANTHIN

Why Lutein & Zeaxanthin are vital for healthy vision.

Good nutrition is important to keep your eyes healthy.  Researchers have linked two very important eye nutrients that play a key role in healthy vision.  Lutein (LOO-teen) and Zeaxanthin (zee-ah-ZAN-thin), both are potent antioxidants and are best known for protecting your eyes and may reduce your risk for macular degeneration and cataracts.

Lutein and zeaxanthin are two types of carotenoids (kuh-RAH-teh-noids), which are yellow to red pigments found widely in vegetables and other plants and lutein is a yellow pigment, in high concentrations it appears orange-red.

Both lutein and zeaxanthin can also be found in high concentrations in the macula of the human eye.  The macula is essential for vision. Lutein and zeaxanthin work as important antioxidants in this area by protecting your eyes from harmful free radicals. It’s thought that a reduction of these antioxidants over time can impair eye health.  Along with other natural antioxidants, including vitamin C, beta-carotene (vitamin A) and vitamin E, these important pigments guard the body from damaging effects of free radicals, which are reactive molecules that can destroy cells and play a role in many diseases.  It is also believed that lutein and zeaxanthin in the macula block blue light from reaching the underlying structures in the retina, thereby reducing the risk of light-induced oxidative damage that could lead to macular degeneration (AMD).

Unfortunately, the human body does not naturally make the lutein and zeaxanthin it needs. This is why getting daily amounts of lutein and zeaxanthin through your diet or nutritional supplements can help maintain good eye health.

 

Foods that Contain Lutein and Zeaxanthin

Diets rich in these two nutrients may help hold off age-related eye diseases. The best natural food sources of lutein and zeaxanthin are green leafy vegetables and other green or yellow vegetables. Among these, cooked kale and cooked spinach top the list.

Key sources of these carotenoids include kale, parsley, spinach, broccoli and peas. Orange juice, honeydew melon, kiwis, red peppers, squash and grapes are also good sources of lutein and zeaxanthin.

In addition, egg yolk may be an important source of lutein and zeaxanthin, as the high fat content of the yolk may improve the absorption of these nutrients.

For eye healthy recipes visit Eye Cook

Lutein and Zeaxanthin Supplements

Because of the benefits of lutein and zeaxanthin, many nutritional companies have added these carotenoids to their multiple vitamin formulas. Others have introduced special eye vitamins that are predominantly lutein and zeaxanthin supplements.

Some popular lutein and zeaxanthin supplements include:

  • MacuHealth with LMZ3 (MacuHealth LLC)
  • EyePromise Zeaxanthin (Zeavision)
  • ICaps Eye Vitamin Lutein & Zeaxanthin Formula (Alcon)
  • Macula Complete (Biosyntrx)
  • MacularProtect Complete (ScienceBased Health)
  • MaxiVision Ocular Formula (MedOp)
  • OcuGuard Plus (TwinLab)
  • Ocuvite (Bausch + Lomb

The source of lutein in many lutein supplements is marigold flowers, while for zeaxanthin it is often red peppers. If you choose a lutein and zeaxanthin supplement, make sure it’s a high quality product from a reputable dietary supplement company.

Be sure to keep in mind that individuals sometimes react differently to certain supplements, which can have unintended effects such as adverse reactions with medications. Consult with your physician or eye doctor before trying any vision supplements.

For Eye Healthy Recipes visit Eye Cook

Remember that taking dietary supplements does not replace a healthy diet. Eating a well-balanced diet that includes plenty of fruits and vegetables usually is the best way to get the important eye nutrients you need.