Glaucoma is a group of eye conditions that damage the optic nerve. The optic nerve sends visual information from your eye to your brain and is vital for good vision. Damage to the optic nerve is often related to high pressure in your eye. But glaucoma can happen even with normal eye pressure.
Glaucoma can occur at any age but is more common in older adults. It is one of the leading causes of blindness for people over the age of 60.
Many forms of glaucoma have no warning signs. The effect is so gradual that you may not notice a change in vision until the condition is in its later stages.
It's important to have regular eye exams that include measurements of your eye pressure. If glaucoma is recognized early, vision loss can be slowed or prevented. If you have glaucoma, you'll need treatment or monitoring for the rest of your life.
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It's a condition that can damage your optic nerve, usually because of the pressure in your eye. The optic nerve does an important job. It sends signals from your eye to your brain, which turns them into an image you can see. When the optic nerve isn't working right, you'll get problems with your vision. You can even lose your sight.
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Your eyes make a fluid that bathes and nourishes tissue in them. Normally the liquid flows through a channel called the drainage angle. When you have glaucoma, the channel stops working well. Fluid backs up and causes pressure to build up inside your eye.
In other cases, your drainage angle may be open but your eye may be producing too much of the normal fluid.
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You're more likely to get the condition if your parent, brother or sister, or another close relative has it. Your chances of getting it are greater if you're over 40, are African-American or Hispanic, or because of things like:
There are 4 main kinds of glaucoma. The most common is open-angle glaucoma, which affects about 90% of people with the disease. It's called "open angle" because there's a clear opening to the drainage canal, which gets clogged further inside. This type comes on slowly. You may not notice any symptoms at first.
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This type comes on fast and it's a medical emergency. It typically happens to people with a narrow opening to their drainage canal, which gets blocked suddenly. That keeps fluid from flowing out of your eye. Pressure inside the eye rises quickly. If you get severe eye pain, headache, nausea, or vision loss, get medical help right away to prevent blindness. You'll likely need surgery to open up the drainage canal.
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If you have this kind of glaucoma, the pressure in your eye is normal, but you still get optic nerve damage. Doctors aren't completely sure why. One possibility is you're extra sensitive to slight increases in eye pressure. Or it may be that lower blood flow to the optic nerve is causing damage. Your doctor may suggest a treatment that puts your eye pressure at a level that's lower than normal.
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It's a rare form of the disease that affects babies. It happens when the drainage channels in the eyes don't properly develop in the womb. Your baby's eye may get cloudy and look larger than normal. Surgery can fix the problem. Most babies who are treated early will have normal vision throughout their lives.
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Since open-angle and normal-tension glaucoma sneak up on you slowly, symptoms may not show up until the disease is already far along. Without treatment, you'll slowly lose your peripheral (side) vision. That means you may miss objects that you would normally see out of the corner of your eye. It's a bit like looking through a tunnel.
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A regular eye exam is the best way to find glaucoma early. Your doctor will do some or all of these tests:
Your doctor will likely suggest eyedrops or pills to manage your glaucoma. They cut how much fluid your eyes make and help it drain off. Take your medicine every day to keep your condition under control. Let your doctor know if you get side effects, like burning, stinging, and redness in your eyes.
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Your doctor may suggest a procedure called laser trabeculoplasty to treat open-angle glaucoma. They'll numb your eye and then use a laser beam to make small holes in the drainage channel to help fluid flow out. Usually doctors treat one eye at a time. Laser surgery can lower pressure in your eyes, but the effects may not be permanent. Some people need more than one surgery to get long-term results.
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If medicine and laser surgery don't lower your eye pressure enough, your doctor might recommend a procedure called trabeculectomy. They create a flap in the white part of your eye to let more fluid drain out. About half of people who have this surgery don't need glaucoma medicine anymore. But sometimes the opening closes again and you'll need a second surgery.
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About half of people with glaucoma don't know they have it. To prevent vision loss, know your family history and other risks. Get an eye exam every 1 to 2 years. If your doctor tells you that you have glaucoma, follow their treatment directions carefully. Let them know about any changes in the way you see right away.
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Eyedrops, surgery, and other treatments can help you manage your glaucoma and prevent you from losing your vision. You'll need to keep up with your treatment throughout your life to keep your eye pressure in check. Your doctor will want you to see them for checkups a few times a year.
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