Many changes in vision are a normal part of aging. Most people find when they hit their 40s they start to have trouble seeing clearly at close distances. This can be corrected with reading glasses. But some changes may or may not be normal.

For example, many older adults see "floaters" -- tiny dots or spots that can almost seem like flying insects. For many, floaters are annoying but nothing to worry about. But since they can sometimes be an indication of something serious, they should be checked by an eye doctor.

Other symptoms, such as eye pain, swelling and double vision or blurry vision are often caused by something serious, possibly cataracts, glaucoma or retinal disorders such as macular degeneration. If you have any of these symptoms, schedule an appointment with an ophthalmologist or optometrist.

The National Institute on Aging has information on aging and your eyes at