Glaucoma is a term used for eye disorders that damage the optic nerve. It usually occurs due to fluid buildup in the eye, a leading cause of vision loss. The extra fluid increases pressure on the eye (intraocular pressure), gradually causing optic nerve damage. Some people develop glaucoma even with normal IOP (eye pressure). If not treated, the disease can lead to irreversible vision loss. 

Dry eye is a condition of the surface of your eye that may occur when your eye produces insufficient tears or there is a problem with the tears your eyes make. It may also happen when the tears evaporate too quickly. When you have dry eye, you may experience blurry vision, dryness, and a burning sensation in your eye. You may also experience discomfort and pain.

The Glaucoma Research Foundation reports over three million individuals in the United States with the condition. Experts show that 50 percent of people with glaucoma are unaware of their eye condition and health status. Projections by the National Eye Institute expect the numbers to increase to 58 percent by 2030.