Thanks for emailing that article!
In normal-tension glaucoma, the intraocular pressure (IOP) is not very high, but the optic nerve is still damaged.
Doctors do not know why some people's optic nerves are damaged even though they have almost normal (between 12-22 mm Hg) pressure levels. Those at a higher risk for this type of glaucoma include:
This type of glaucoma is generally detected after an examination of the optic nerve.
The Glaucoma Research Foundation sponsored an international study to help determine what type of treatment is best for this type of glaucoma. Most doctors treat normal tension glaucoma by keeping normal eye pressures as low as possible by using medicines, laser surgery, or filtering surgery.
Last reviewed on September 06, 2013