Normal Tension Glaucoma is a less frequently found-but important type of glaucoma-that is characterized by patients having “normal” intraocular pressure but still experiencing eye damage such as loss of their visual field or “side vision” and optic nerve damage.
Researchers at the World Glaucoma Congress reported that certain patients who suffer from Normal Tension Glaucoma who also have vascular disease or even a predisposition to vascular disease such as a family history of stroke, the presence of cardiovascular disease or migraine may not be as easy to treat in avoiding the progression of Normal Tension Glaucoma. In fact, these factors related to vascular disease may indicate less effectiveness of eye pressure (IOP) treatment putting patients at greater risk. The the Collaborative Normal Tension Glaucoma Study is the landmark study for guiding treatment-in which 65% of patients in the untreated group of that study never showed any progression during 7 years of follow-up. But, for those at greater risk due to some other vascular disease we have to be diligent in our examinations and testing to help preserve eye health and vision.