When you go to the eye doctor for an eye exam, you are tested for glaucoma. Glaucoma occurs when there is a buildup of internal eye pressure, which can ultimately cause damage to the optic nerve. The optic nerve is what transmits visual images to the brain, and damage to this nerve can lead to blindness.

The average American spends seven hours a day on a computer. As a result, many individuals are experiencing eye discomfort and vision problems resulting from extended time viewing screens on computers, tablets, e-readers, and cell phones. Working adults aren’t the only ones affected because kids who stare at tablets or use computers during the day at school can have issues, too. In fact, this problem has become so common that it has been given a name—computer vision syndrome (CVS) —also called digital eye strain.

A cataract occurs when the eye’s natural lens begins to cloud. The natural lens is located behind the iris and the pupil, and is made up of mostly water and protein. The natural lens works similarly to a camera lens by focusing light onto the retina which is located at the back of the eye.