Different types of glaucoma - what you need to know

November 10, 2022

What is Glaucoma

Glaucoma is a common eye disease that affects over 720,000 Canadians, and is the third most common cause of blindness in Canada.


Glaucoma occurs when fluid builds up inside the eyeball, causing increased pressure within the eye. This increases the risk of damage to the optic nerves. When left untreated, glaucoma can lead to complete or partial sight impairment.

glaucoma

Glaucoma is more common in people over the age of 60, however it is possible that it can happen at any age.  At this time there isn't a cure for glaucoma, but if the disease is treated early the loss of vision can often be prevented.

Because the damage occurs slowly, it may not become apparent until later.


Glaucomas may progress from mild to severe, leading to poor quality of life, increased risks of falls, decreased mobility and difficulties with walking.


Here is Dr. Tom Wilk on different types of glaucoma, symptoms and treatment options

Glaucoma Types

While there are many different subtypes of glaucoma, they all may be grouped into one of two categories:

  • Open-angle glaucoma
  • Narrow (or closed) angle glaucoma.

This description has to do with the anatomy of the eye, and the angle between the iris and the cornea. Since the eye’s internal fluid drains through this angle, an imbalance between the fluid produced and the fluid leaving the eye will cause a gradual increase in eye pressure.

Glaucoma Symptoms

In most cases, glaucoma has no symptoms. Known as the “silent thief of sight” there is no pain, irritation or change in vision early on, which is why it can be difficult to find. This is why only about half the people with glaucoma are even aware they have it


When it does become more advanced, it starts to affect peripheral vision. The changes are very subtle, often for many years. In advanced cases the vision loss becomes more centralized and may eventually lead to permanent blindness.

Glaucoma Causes

The cause of this eye disease depends on the specific glaucoma type. An eye injury, genetic abnormality, or age related condition may be a contributing factor. Conditions associated with a higher risk of glaucoma include diabetes, high myopia (nearsightedness) and sleep apnea.

Glaucoma Treatment

Treatment for glaucoma is aimed at lowering internal eye pressure. This may be through glaucoma surgery, or more commonly with the use of pressure-lowering eye drops designed to increase the fluid drainage from within the eye, or slow down its production. The eye drops are used typically one to three times per day.


Diagnosing glaucoma is no longer only about measuring your eye pressure. At MVO we have specialized equipment and optometrists that are experienced with managing glaucoma. Many different variables are assessed and tracked over time.

A comprehensive eye exam and frequent follow up testing is necessary at the interval recommended by your eye doctor to ensure nothing is missed.

Regular eye exams are the best way to ensure your eye health is getting the proper attention.


Frequently asked questions about glaucoma

  • How do I know if I have glaucoma if I don't have any symptoms?

    To know whether you have glaucomatous damage, you need to have regular eye checkups at least once per year. There are many different types of glaucoma and some people may not experience any signs until they're already quite far into the disease. Acute symptoms of glaucoma are rare and are limited to "narrow angle" types. They may include headaches, blurred vision, redness, pain, halos around lights, and nausea and/or vomiting If you notice any of these signs, see an optometrist  immediately.

  • Is high blood pressure (hypertension) a risk factor for developing glaucoma

    While hypertension may increase the risk for glaucoma, the relationship isn't yet clear. However, we do know that LOW blood pressure may in fact be related to glaucoma because in these cases there is a risk that the optic nerve is not getting enough blood flow.

  • Will I lose my eyesight if I've been diagnosed with glau­coma?

    Glaucoma remains one of the leading causes of vision loss in the world. With modern technology, we have made great progress in treating glaucoma and preventing severe consequences such as permanent vision loss.. At Mountain View Optometry in Calgary and Cochrane, we have invested in advanced equipment for detection of early disease, and all our eye doctors are experienced and certified to manage glaucoma.. Today, if glaucomatous changes are detected early enough, our eye doctors can often treat them successfully. Although it is a chronic eye condition requiring lifelong care, glaucoma is much less likely to lead to permanent visual impairment when managed by experienced optometrists

  • What is the difference between generic drops and brand name drops?

    Typically, generic medications are less expensive than brand name ones, which is the only reason why one might consider using them. However, they are not always an equivalent substitution for the branded medications. Differences may exist in the dispensing agent (bottle) as well as the effectiveness of the product. Whenever a generic glaucoma medication is going to be considered, close monitoring by the optometrist will be necessary to ensure that the treatment benefits are maintained.

Book an appointment with Mountain View Optometry now to discuss your findings and any risk factors with your MVO optometrist.

By Rosendo C February 21, 2025
RES / REI is an independent brand born in 2012 in Treviso, in the heart of the Italian eyewear manufacturing district. The brand is unrelated to the mass-market common sense and addresses those individuals who are in search of unique high-quality products.
A boy and a girl wearing glasses are playing with a pair of glasses.
By Rosendo C February 19, 2025
Discover Opal's Hero Flex Hinge: a 360° twistable, unbreakable rubber hinge made to handle every challenge kids throw its way. Durable, flexible, and kid-proof!
By Rosendo C February 19, 2025
Bevel Eyewear Fall-Winter 2024
By Rosendo C February 19, 2025
Bevel Eyewear Spring-Summer 2024
A woman wearing yellow glasses is sitting in a red chair.
By Rosendo C February 19, 2025
Bevel Eyewear Fall-Winter 2023
A man and a woman wearing cowboy hats and glasses are sitting on a couch.
By Rosendo C February 19, 2025
Bevel Eyewear Spring-Summer 2023
A man wearing glasses and a leather jacket
By Rosendo C February 12, 2025
Discover the latest collection at MVO-Pellicer by Etnia, a family legacy in eyewear that spans three generations. Inspired by Barcelona's cultural heritage, this collection blends innovative designs with top-quality materials like titanium and high-grade Italian acetate for unmatched durability, comfort, and style.
The cover of a book called moscot mysteries
By Rosendo C February 10, 2025
Unveil the allure of MOSCOT Mysteries, a new eyewear collection blending timeless design with New York’s vibrant Lower East Side spirit. Crafted for the curious, each piece holds a secret waiting to be discovered.
By Rosendo C February 10, 2025
Explore MOSCOT’s newest eyewear collection, where iconic styles like The MAYDELA, The MOYEL, and The YENEM receive modern updates. Blending heritage design with contemporary craftsmanship, this season’s frames are crafted to last generations.
By Rosendo C February 9, 2025
Explore MOSCOT’s Fall 2023 collection, inspired by the iconic sports culture of the late 60s to early 80s. Featuring bold acetates and reimagined aviators, this collection blends retro style with contemporary design.
Show More
Share by: