Your risk for some eye diseases and conditions increases as you grow older, and some eye changes are more serious. Keep your eyes as healthy as possible by getting regular eye exams so any problems can be spotted early.

Normal changes in the aging eye usually do not harm your vision. However, sometimes they can be signs of a more serious problem. For example, your eyes may leak tears. This can happen with light sensitivity, wind, or temperature changes. Sunglasses and eye drops may help. Sometimes, leaking tears may be a symptom of dry eye or sign of an infection or blocked tear duct. Your eye care professional can treat these problems.


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During this exam, the eye care professional will put drops in your eyes to widen (dilate) your pupils so that he or she can better see inside each eye. Your vision may be blurry after the exam, and your eyes may be more sensitive to light. This only lasts a few hours. Make plans for someone else to drive you home.

The following eye problems can lead to vision loss and blindness in older adults. They may have few or no early symptoms. Regular eye exams are your best protection. If your eye care professional finds a problem early, often there are things you can do to protect your vision.

Vision rehabilitation programs and special aids, such as a magnifying device, can help you adapt to vision loss and make the most of your remaining sight. There are also programs, such as the National Library Service, that link people who have low vision or visual disabilities to resources at no cost.

Remember to ask your eye doctor if it is safe for you to drive with your vision. If you have to stop driving, organizations in your area may be able to arrange rides for you, or public transportation may be available.

Which part of your body lets you read the back of a cereal box, check out a rainbow, and see a softball heading your way? Which part lets you cry when you're sad and makes tears to protect itself? Which part has muscles that adjust to let you focus on things that are close up or far away? If you guessed the eye, you're right!

You can check out different parts of the eye by looking at your own eye in the mirror or by looking at (but not touching) a friend's eye. Some of the eye's parts are easy to see, so most friends will say OK. Most friends won't say OK if you ask to see their liver!

The eyelid also has great reflexes, which are automatic body responses, that protect the eye. When you step into bright light, for example, the eyelids squeeze together tightly to protect your eyes until they can adjust to the light. And if you flutter your fingers close (but not too close!) to your friend's eyes, you'll be sure to see your friend's eyes blink. Your friend's eyelids shut automatically to protect the eye from possible danger. And speaking of fluttering, don't forget eyelashes. They work with the eyelids to keep dirt and other unwanted stuff out of your eyes.

The white part of the eyeball is called the sclera (say: SKLAIR-uh). The sclera is made of a tough material and has the important job of covering most of the eyeball. Think of the sclera as your eyeball's outer coat. Look very closely at the white of the eye, and you'll see lines that look like tiny pink threads. These are blood vessels, the tiny tubes that deliver blood, to the sclera.

The cornea (say: KOR-nee-uh), a transparent dome, sits in front of the colored part of the eye. The cornea helps the eye focus as light makes its way through. It is a very important part of the eye, but you can hardly see it because it's made of clear tissue. Like clear glass, the cornea gives your eye a clear window to view the world through.

Behind the cornea are the iris, the pupil, and the anterior chamber. The iris (say: EYE-riss) is the colorful part of the eye. When we say a person has blue eyes, we really mean the person has blue irises! The iris has muscles attached to it that change its shape. This allows the iris to control how much light goes through the pupil (say: PYOO-pul).

The pupil is the black circle in the center of the iris, which is really an opening in the iris, and it lets light enter the eye. To see how this works, use a small flashlight to see how your eyes or a friend's eyes respond to changes in brightness. The pupils will get smaller when the light shines near them and they'll open wider when the light is gone.

These next parts are really cool, but you can't see them with just your own eyes! Doctors use special microscopes to look at these inner parts of the eye, such as the lens. After light enters the pupil, it hits the lens. The lens sits behind the iris and is clear and colorless.

The lens works much like the lens of a movie projector at the movies. Next time you sit in the dark theater, look behind you at the stream of light coming from the projection booth. This light goes through a powerful lens, which is focusing the images onto the screen, so you can see the movie clearly. In the eye's case, however, the film screen is your retina.

Think of the optic nerve as the great messenger in the back of your eye. The rods and cones of the retina change the colors and shapes you see into millions of nerve messages. Then, the optic nerve carries those messages from the eye to the brain!

The optic nerve serves as a high-speed telephone line connecting the eye to the brain. When you see an image, your eye "telephones" your brain with a report on what you are seeing so the brain can translate that report into "cat," "apple," or "bicycle," or whatever the case may be.

Tears also keep your eye from drying out. Then the fluid drains out of your eye by going into the lacrimal duct (this is also called the tear duct). You can see the opening of your tear duct if you very gently pull down the inside corner of your eye. When you see a tiny little hole, you've found the tear duct.

Your eyes sometimes make more tear fluid than normal to protect themselves. This may have happened to you if you've been poked in the eye, if you've been in a dusty or smoking area, or if you've been near someone who's cutting onions.

Summertime often means long hours in the sun. Most of us remember to protect our skin by applying sunblock, but don't forget that your eyes need protection as well. It is important to start wearing proper eye protection at an early age to shield your eyes from years of ultraviolet exposure.

"UV radiation, whether from natural sunlight or indoor artificial rays, can damage the eye's surface tissues as well as the cornea and lens," says ophthalmologist Michael Kutryb, MD, a spokesperson for the American Academy of Ophthalmology. "Unfortunately, many people are unaware of the dangers UV light can pose. By wearing UV-blocking sunglasses, you can enjoy the summer safely while lowering your risk for potentially blinding eye diseases and tumors."

You need a little natural light every day to help you sleep well. That's because the light-sensitive cells in our eyes play an important role in our body's natural wake-sleep cycles. This is especially important as we age and become more apt to insomnia.

Spending time outdoors in the daylight can also help prevent nearsightedness in kids. Not only is exercise great for eye health, but exercising outside may be additionally beneficial. Take your children outside to play to help lower their risk for nearsightedness and teach them good habits for a lifetime of eye health.

What I will say is that my experience plunged me deep into the world of narrative gerontology and how redemptive it is for people nearing the end of their lives to reflect and reprocess memories from earlier in their lives. So you can imagine how stunned I was to read about groundbreaking new research that the proverbial piece of folk wisdom\u2014my life flashed before my eyes\u2014is actually true and is itself an act of life narrativization.

In other words, life review is so important; making meaning from your memories is so important; creating a unifying narrative of your existence is so important that it just may be the last thing we do when we\u2019re alive \u2013 and even the first thing we do after we die.

Duke Today is produced jointly by University Communications and Marketing and the Office of Communication Services (OCS). Articles are produced by staff and faculty across the university and health system to comprise a one-stop-shop for news from around Duke. Geoffrey Mock of University Communications is the editor of the 'News' edition. Leanora Minai of OCS is the editor of the 'Working@Duke' edition. We welcome your comments and suggestions!

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