An eye exam can reveal more than whether or not you need glasses. Some critical health issues, which may have no symptoms until well advanced, can be discovered by your doctor. These include:
How often should you have your eyes tested?
If you have a health condition, your eye doctor may suggest more frequent eye examinations.
Your eye doctor will also be able to test your eyes for:
Your local SCCLD library has lots more information on eyes and eye care.
Here are some books you might want to take a lk at:
Fact and Fiction of Healthy Vision
Reader's Digest Guide to Eye Care
All about your Eyes