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Glaucoma gradually steals your peripheral vision through damage to the optic nerve. There's no pain or other symptoms, and most patients don't even know they have the disease until they've lost a significant part of their vision.
Glaucoma is one of the leading causes of blindness around the world. There's no cure and once the damage is done, it can't be reversed – but there are medications that can slow down its progress. Ophthalmologists can detect and treat glaucoma before most patients experience any vision loss, which is why it's so crucial that people over 40 have their eyes checked regularly.
Our Glaucoma Clinic is part of the
Donald K. Johnson Eye Institute. We treat more than 5,000 patients a year with the latest technology in optic nerve imaging and visual fields. We have special expertise in laser treatments and surgical techniques, including the use of glaucoma drainage devices such as the Ahmed Glaucoma Valve.
This is a common type that gradually reduces your peripheral vision without other symptoms. By the time you notice it, permanent damage has already occurred.
This produces sudden symptoms, such as eye pain, headaches, halos around lights, dilated pupils, vision loss, red eyes, nausea and vomiting.
This type can cause visual field loss due to optic nerve damage.
This is a rare form caused by clogging of the drainage angle of the eye thanks to pigment that has broken loose from the iris, cutting down the fluid outflow from the eye.
After an eye injury, symptoms may show this form of the disease, which can also develop with the presence of eye infection, inflammation, a tumour or enlargement of the lens due to a cataract.
This is an inherited form present at birth. Most cases are diagnosed by age one.
Most cases of glaucoma can be controlled with one or more drugs. But some people may require surgery to reduce their intraocular pressure (fluid pressure in the eye) further to a safe level by improving the outflow or drainage of fluids.
Surgery can occasionally eliminate the need for glaucoma eye drops, but you may need to continue with eye drops even after having glaucoma surgery.
Learn more about
what you can expect when you have a clinic appointment.
Visit our health information section.
Our team of ophthalmologists is dedicated to helping restore vision to patients who suffer from glaucoma. Glaucoma is a disease that's referred to as "the thief in the night," but every day our doctors help patients stop their loss of vision and in some cases, gain back a portion of their sight.
You will be contacted with information about your first appointment.
Please bring the following to your appointment. Not all of these items may be needed for your appointment. Our clinic or your referring doctor will let you know what you must bring.
Please arrive 15 minutes before your appointment.
When you arrive, you will sign in with the receptionist. You will need your health card (OHIP card) to sign-in. If you do not have an OHIP card, please bring another form of government-issued photo ID, such as a driver’s license or passport.
You may be given a Measuring Health Equity Questionnaire to fill out. This form contains questions about your background. We collect this information to find out who we serve and what unique needs you may have. The form is voluntary and you can choose ‘prefer not to answer’ to any or all questions. However, the information you choose to give us will help us improve the quality of care for you and others.
First appointments take longer than follow-up appointments. Your first appointment can take 2 hours or more. Follow-up appointments usually take 15 to 30 minutes. We do everything we can to stay on time but sometimes unforeseen circumstances may delay your appointment.
At the end of your first appointment, the nurse or doctor will give you a contact list for your health care team. If you don’t get a contact list, feel free to ask for it.
After every appointment, a member of your health care team will tell you about your next visit. Be sure you understand what is going to happen next. For example, know the time and place of your next visit or if someone will call you with this information.
If you are unsure about what your next steps are, don’t be afraid to ask a member of your team. We are here to help you.
We understand that reaching us by phone can sometimes be difficult. Often our phone lines are busy or are turned over to the message centre so our staff can prepare for clinic visits or help other patients. We make every effort to return your call within 24 hours. Our staff will try to reach you 2 times. If we are not able to reach you directly you may need to call us again.