Dry eye disease is a common condition that occurs when your tears aren't able to provide adequate lubrication for your eyes. Tears can be inadequate and unstable for many reasons. For example, dry eyes may occur if you don't produce enough tears or if you produce poor-quality tears. This tear instability leads to inflammation and damage of the eye's surface. READ MORE HERE

Eye allergies, also called allergic conjunctivitis, are quite common. They occur when the eyes react to something that irritates them (called an allergen). The eyes produce a substance called histamine to fight off the allergen. As a result, the eyelids and conjunctiva become red, swollen and itchy. The eyes can tear and burn. Unlike other kinds of conjunctivitis, eye allergies do not spread from person to person.

There are more than 350 hereditary eye diseases, such as albinism, aniridia, colorblindness, corneal dystrophies, glaucoma, keratoconus, Leber congenital amaurosis, night blindness, retinitis pigmentosa and retinoblastoma, to name just a few.

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