Glaucoma Eye Exams in Calgary

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Preventing Blindness in Canada

Glaucoma, known as the silent thief of sight, is Canada’s leading cause of blindness. It has earned its nickname because it progresses slowly and can go unnoticed without testing. Regular eye exams are crucial for diagnosing glaucoma and eye conditions that can develop into sight-stealing conditions.

Visit Dr. Bishop & Associates to assess your visual health today.

Glaucoma Symptoms

There are multiple types of glaucoma, and symptoms vary. The general symptoms of glaucoma include:

If you experience symptoms suddenly or an increase in intensity, call us for an emergency eye care appointment. This may indicate acute-angle closure glaucoma (narrow-angle glaucoma), which is a medical emergency.

We still want you to give us a call for all other treatments and management. We can help monitor your eye health and prevent worsening symptoms. Vision loss can be prevented. Request an appointment to talk about your sight.

Types of Glaucoma

As glaucoma often has no known cause, it is divided into two main types: primary or secondary. Primary glaucoma develops in the eye. Secondary glaucoma occurs when a health condition outside the eye causes ocular damage. 

Read on for more information about types of primary and secondary glaucoma.

Primary Glaucoma

Primary glaucoma develops in the eye. With primary glaucoma, the exact cause of the condition is often unknown.

Open-Angle Glaucoma

Open-angle glaucoma is one of the more common types. The eye condition develops when too much intraocular pressure builds in your eye. The pressure pushes on the optic nerve, which is responsible for interpreting vision for our brain.

Over time, the pressure can damage the optic nerve, affecting vision and leading to blindness. People with diabetes or high blood pressure are at higher risk for developing this type.

Normal-tension glaucoma or low-pressure glaucoma is a type of glaucoma where intraocular pressure is not elevated above normal. Instead, it occurs because of poor blood flow to the optic nerve.

Angle-closure glaucoma (also narrow-angle or acute glaucoma) is a sudden increase in eye pressure and requires immediate medical attention. It presents with typical glaucoma symptoms but also adds:

  • Eye redness
  • Severe headache
  • Intense eye pain
  • Sudden blurry vision
  • Nausea or vomiting
  • Sudden loss of sight
  • Pupils of different sizes

Acute glaucoma occurs when fluid quickly builds in the eye, increasing pressure suddenly. The eye condition can develop rapidly and cause blindness in days. Book an appointment for emergency eye care if you experience symptoms.

Congenital glaucoma is a rare condition where infants are born with an eye problem preventing fluid from draining. The draining issue may be partial, which would allow some drainage but not enough for healthy function.

Infants with congenital glaucoma exhibit the following symptoms:

  • Cloudy eyes
  • Light sensitivity
  • Excess tears
  • Larger than normal eyes

Early diagnosis and treatment can be effective in preventing permanent vision loss in infants.

Secondary Glaucoma

Secondary glaucoma is caused by a health condition outside the eye. Your eye health is connected to your overall health. If you have health conditions, such as diabetes or high blood pressure, it can impact your eyes and vision.

Neovascular Glaucoma

Extra blood vessels or abnormal blood vessel growth can block fluid drainage, which causes neovascular glaucoma. It’s typically caused by other medical conditions, such as diabetes or high blood pressure.

Treatment requires a diagnosis of the medical condition that is causing the neovascular glaucoma. Then, our health care team can treat your overall health to reduce risk factors for eye conditions.

Pigmentary glaucoma occurs when pigment (colour) from your iris (the coloured part of your eye) flakes off. The flake disrupts fluid drainage and increases intraocular pressure.

This eye condition typically presents with symptoms of blurry vision or rainbow-coloured rings around lights.

Uveitic glaucoma develops in people with uveitis. Uveitis is an eye condition that causes swelling and inflammation in the eye, sometimes appearing similar to conjunctivitis (pink eye).

Although uveitis is treatable, the longer your eye is inflamed, the more likely you’ll develop scar tissue. The scar tissue in your eye can prevent fluids from draining normally.

If you experience ocular redness, irritation, or swelling, see our optometrists for an eye exam. Assessing your changing eye health can protect your sight.

Our Technology for Diagnosing Glaucoma

When you book a glaucoma eye exam, you will likely come eye-to-eye with these diagnostic technology tools.

iCare Eidon

The iCare Eidon is a confocal fundus imaging system used for taking images of your fundus, the area located at the back of your eye. The scan takes multiple pictures in different modes to provide better contrast and colour detail. The 3D images show sections of your eye, allowing your optometrist to visualize tissue depth. In addition, the noninvasive process is dilation-free.

Tonometry tests measure intraocular pressure (IOP), a significant indicator of optic nerve damage or glaucoma. A non-contact tonometer is a method of testing that doesn’t touch your eye. It’s also known as an air puff test, since the machine blows a quick puff of air at your eye. It’s less invasive than other tonometry tests, which often place a probe or tool directly against your eye.

The visual field test is another technology we use to detect signs of vision loss. Once the test starts, small lights begin flashing across various areas of the screen. Every time you see a light flash, you’ll record it (usually with a button) and we can track any areas where your vision is reduced or missing.

Optical Coherence Tomography (OCT) is a non-invasive imaging test that uses light ways to take cross-sectional images of your retina. This helps identify and diagnose ocular conditions and diseases, such as glaucoma and age-related macular degeneration.

Frequency doubling technology (or FDT) is designed to help us detect loss of field of vision due to diseases like glaucoma.

The test places an image with one black and one white bar on a screen in front of you. When we alternate flickering the two bars at various frequencies, they should appear to double. If a patient can’t see the bars at a certain frequency, it may indicate vision loss.

Stop the Silent Thief of Sight

Seeing your optometrist regularly for comprehensive eye exams is the best way to stop the silent thief of sight. Protect your vision and eye health with the expertise of your eye care team.

Book an appointment with Dr. Bishop & Associates today.

Our Locations

You deserve the highest standard of eye care. Our 4 locations make it easy for you to receive quality eye care, no matter where you live.

Willow Park Village

  • 412 – 10816 Macleod Trail SE
  • Calgary, AB T2J 5N8

Legacy Township

  • 230 – 200 Hartell Way SE
  • Calgary, AB T2X 4S9

Beacon Hill

  • 610 – 11877 Sarcee Trail NW
  • Calgary, AB T3R 1W5

Northgate Village

  • 103 – 495 36 St NE
  • Calgary, AB T2A 6K3

News & Resources

Pinguecula vs. Pterygium: What’s the Difference?

Eye health

If you’ve noticed small yellowish growths in your eyes or raised bumps on your eye surface, you may be experiencing a pinguecula or pterygium. It’s vital to understand that while these growths are commonly harmless, monitoring them to ensure they don’t become a problem down the road is essential.  Pingueculas and pterygiums are both non-cancerous, […]

Read More…

September 14, 2022
Donald Bishop

Is it Safe to Order Glasses Online?

Eyeglasses

Getting a new pair of glasses can be a fun experience for the whole family. Picking out stylish frames that match your unique style is something your optometrist knows you look forward to following your eye exam. We can help you achieve the proper fit during a frame and lens fitting to help ensure your […]

Read More…

September 14, 2022
Donald Bishop

Is It OK to Buy Contact Lenses Online?

Contact Lenses

With a rise in e-commerce, it’s understandable why many customers are attracted to online shopping. However, not all products are safe to buy online. Contact lenses are one of them.  Here are a few reasons why they are different: Contact lenses are medical devices They go inside your eyes and sit directly on your cornea […]

Read More…

September 14, 2022
Donald Bishop
A close up of an eye with pinguecula.

If you’ve noticed small yellowish growths in your eyes or raised bumps on your eye surface, you may be experiencing a pinguecula or pterygium. It’s vital to understand that while these growths are commonly harmless, monitoring them to ensure they don’t become a problem down the road is essential.  Pingueculas and pterygiums are both non-cancerous, […]

Read More…

A woman wearing glasses holds a credit card and types on her laptop as she makes an online order.

Getting a new pair of glasses can be a fun experience for the whole family. Picking out stylish frames that match your unique style is something your optometrist knows you look forward to following your eye exam. We can help you achieve the proper fit during a frame and lens fitting to help ensure your […]

Read More…

A woman smiling and wearing glasses holds a credit card while online shopping for contact lenses on her laptop.

With a rise in e-commerce, it’s understandable why many customers are attracted to online shopping. However, not all products are safe to buy online. Contact lenses are one of them.  Here are a few reasons why they are different: Contact lenses are medical devices They go inside your eyes and sit directly on your cornea […]

Read More…

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