A cataract is a clouding of the eye's lens, a clear, soft structure behind the pupil that works much like a camera lens. The top cause of cataracts is aging. In fact, more people over 70 have cataracts than not.

Surgery is necessary only when vision reaches a point that, even with prescription lenses, a person is unable to see well enough to do the things he or she wants to do.

Laser vision surgery is a popular treatment of vision problems that eliminates the need for eyeglasses or contact lenses.

The drops enable ophthalmologists to get a far better look at the tiny, complicated world inside your eyes.

Contacts that aren't properly prescribed and cared for can lead to allergic reactions, bacterial infections, corneal ulcers, and corneal scrapes. Some problems can end in blindness.

As your eyes age, their lenses become less flexible, and they slowly lose their ability to focus. It's an ongoing, lifelong process called presbyopia, which you begin to notice between ages 40 and 45.

Eyeglasses can be prescribed for a range of vision problems, from nearsightedness to farsightedness to the diminished vision of advancing age.

You may think we wear sunglasses for comfort and fashion. But here's another important reason to wear sunglasses: to protect the health of your eyes.