Health and Wellness Blog

Glaucoma is a group of diseases that can damage the eye's optic nerve and result in vision loss and  blindness. It's the second most common cause of vision loss in seniors in Canada.

There are different types of glaucoma. The most common one is open-angle glaucoma (more than 250,000 Canadians have it). Most glaucomas involve the drainage system within the eye: the fluid drains too slowly out of the eye – when the normal fluid pressure inside the eyes slowly rises glaucoma occurs. If the pressure isn't controlled, it may cause damage to the optic nerve and other parts of the eye.

Anyone can develop glaucoma, although some people are at higher risk than others. Glaucoma risk factors include:

• Elevated internal eye pressure (intraocular pressure)
• Age
• Ethnic background
• Family history of glaucoma
• Medical conditions
• Other eye conditions
• Nearsightedness
• Prolonged corticosteroid use

Glaucoma has no symptoms at first. People with open-angle glaucoma will slowly lose their peripheral (side) vision without treatment – they seem to be looking through a tunnel (tunnel vision). Over time, straight-ahead vision may decrease until no vision remains.

There is no cure for glaucoma. If it is detected early, glaucoma can be managed before irreversible vison loss occurs. For high risk people after age 35, it is recommended to have eye exam every year or two. Glaucoma treatments include medicines, laser trabeculoplasty, conventional surgery, or a combination of any of these.

Check out some books and DVD from the Toronto Public Library on your topic:

More information on your topic:

• CNIB: Glaucoma
• MedlinePlus: Glaucoma
• National Eye Institute: Facts About Glaucoma
• Glaucoma Research Foundation: Diagnostic Tests, Alternative Medicine
• Glaucoma Foundation: Doctor I Have a Question about Glaucoma: A Guide for Patients and Their Families, How Glaucoma is Treated