Glaucoma is a disease that affects the optic nerve. The disease causes optic nerve damage, which leads to partial or total vision loss. These two types of glaucoma both stem from a problem in the angle between the cornea and iris of the eye. They are called Narrow Angle and Closed Angle Glaucoma.

Narrow Angle glaucoma can develop either quickly or slowly and usually occurs in people with farsightedness. It occurs when the angle narrows causing the aqueous fluid to build up. This narrowing is caused by a bowing of the iris. Narrow Angle glaucoma can only be detected through routine eye examinations. It can cause vision loss and can also lead to an emergency condition called closed angle glaucoma.

Closed angle glaucoma, also called angle closure glaucoma, develops quickly and is a medical emergency. It occurs when the iris bows forward so much that the angle is completely closed. That means that no aqueous fluid can escape, which causes the pressure to build up rapidly. There...

Looking for the perfect sunglasses? If you drive or spend time outdoors, polarized lenses can give you clearer vision by enhancing contrast and eliminating glare.

Glare is caused when light bounces off a smooth surface. Problems from glare range from annoyance to eye strain to temporary blindness.

Light vibrates along all axis. But when light strikes a reflecting object, such as water or a highway, a high percent of light waves bounce off in similar horizontal angles.

Polarized lenses contain microscopic vertical lines that effectively cancel out the horizontal waves—thereby reducing glare.

Select a pair of polarized glasses from the display rack. Find a bright glare on the floor, or tabletop. Next, look at the glare through the glasses. The glare is gone. Rotate the glasses sideways while looking at the same glare. Now rotate back. You can clearly see the difference.

By reducing glare, polarized sunglasses will prevent strong light from damaging your eyes, reduce...