A cataract is a clouding of the lens within the eye. A clear lens in the eye focuses light. This lets the eye see images sharply. With age, the lens slowly becomes cloudy. The cloudy lens is a cataract. A cataract scatters light and makes it hard for the eye to focus. Cataracts often form in both eyes, but one lens may cloud faster than the other.
The cornea functions as a "clear window" on the front of the eye. A corneal abrasion is a scratch on the surface of the cornea. This video discusses how a corneal abrasion occurs, available treatments, and preventive steps you can take.
If you have pain around the eyes, headaches, and blurred vision after using a computer for several hours, you may have computer vision syndrome. You can ease symptoms with special computer glasses. Watch this video for additional details about this condition and tips on computer use.
Convergence insufficiency (CI) is a problem with the way the eye moves. It makes it hard to focus on things nearby. When the eyes converge, it means they point inward (toward the midline) to focus on something close. With CI, the eyes have trouble doing this. One eye may turn out instead of looking inward. CI can cause blurred vision, double vision, and eyestrain.
