As the lens of the eye becomes less flexible, it is less able to focus. This loss of focusing power, called presbyopia, usually occurs in the 40's and can make it harder for you to read fine print or see close objects clearly. Reading glasses or bifocals can help. Normally, the lens of the eye is clear. A cataract causes it to become cloudy.
Vision becomes hazy and blurred.
Cataract eyeglasses or surgery can help. A blockage or too much fluid production can cause pressure build up and damage the optic nerve. If detected early, it can be controlled with special eye drops. Doctors aren't sure what causes macular degeneration and there is no way to prevent it. A small number of people may be helped with laser treatment.