Dry eyes occur when the tear glands produce too few tears. The result is itching, burning, or even reduced vision. Excessive tears may be a sign of increased sensitivity to light, wind, or temperature changes. The lens is normally clear and allows light to pass through. So when a cataract forms, light cannot easily pass through the lens and this affects vision.
Cataracts usually develop gradually and without pain, redness, or tearing in the eye.
Some remain small and do not seriously affect vision. However, if a cataract becomes larger or denser, it can be surgically removed. Cataract patients should discuss the risks and benefits of this optional procedure with their doctor. Glaucoma occurs when there is too much fluid pressure in the eye, causing internal eye damage and gradually destroying vision. The basic cause of glaucoma is not known but, with early diagnosis and treatment, it can usually be controlled and blindness prevented.