1 By Madeline Vann, MPH | Medically reviewed by Lindsey Marcellin, MPH. 2  Skip GERD With These Sweet Treats When it comes to sexy sweets, most people opt for chocolate â Americans spend $1.6 billion on candy on Valentine's Day alone, and a whopping $83 billion throughout the year.
Multimedia. Glaucoma is a group of eye conditions that damage the optic nerve, which is vital to good vision. This damage is often caused by an abnormally high pressure in your eye. Glaucoma is one of the leading causes of blindness in the United States. It can occur at any age but is more common in older adults.
Most people with glaucoma have high pressure inside the eye that damages the optic nerve. Normal-tension glaucoma (also called low-tension glaucoma) is a unique condition in which optic nerve damage and vision loss have occurred despite a normal pressure inside the eye.Eye pressure, called intraocular pressure (IOP), is measured in millimeters of mercury (mm Hg).Normal eye pressure ranges from 10-21 mm Hg. Most people with glaucoma have IOP of greater than 21 mm Hg; however, in normal-tension glaucoma, people have IOP within the normal range.lthough its cause is not completely understood, normal-tension glaucoma is generally believed to occur either because of an unusually fragile optic nerve that can be damaged despite a normal pressure inside the eye or because of reduced blood flow to the optic nerve.