It's a condition that can damage your optic nerve, usually because of too much 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.
What Causes Glaucoma?
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.
Who Gets Glaucoma?
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:
o High pressure in eyes
o Eye injury or surgery
o Thin cornea (clear layer in front of the eye)