Glaucoma Testing and Management

We’re Here to Help Diagnose & Manage Your Glaucoma. Serving Listowel Since 1976.



We are proud of our legacy as one of Listowel’s leading eye care clinics. Since 1976 we have focused on one thing: offering our patients the best care possible. By incorporating new equipment and modern diagnostic techniques, we are able to detect glaucoma weeks and months before what was possible even just a few short years ago.


If you have glaucoma, or are worried that you may have glaucoma, please do not wait any longer for an assessment. Vision that is lost to glaucoma cannot be restored; prevention and preservation is our sole focus. Request an appointment to have an Optometrist assess your glaucoma.

Our management for glaucoma centres along three main points:

  • Accurate diagnosis & monitoring – Before we can manage glaucoma, we need to understand the type and severity of it. We will examine the eye regularly and look for changes in eye health; in particular, we will assess the health of the optic nerve.
  • Management therapy – There are numerous ways glaucoma can be managed. Before we get into anything surgical we use medicated eye drops and oral medications. These treatments centre around reducing your intraocular pressure (IOP), and thus minimizing potential damage to the optic nerve.
  • Advanced management – If your case of glaucoma is proving difficult to manage conventionally, we may consider employing surgical methods that can help reduce intraocular pressure. The most common surgical procedure for managing glaucoma is a laser trabeculoplasty, where a laser is used to carve a small hole near the drainage angle of the eye. This allows eye fluids to drain as normal, resulting in lower IOP.


Glaucoma isn’t a “disease” so much as it’s a series of related diseases. When assessing glaucoma, it’s important to have accurate information about the type of glaucoma you have.

Types of Glaucoma – There are several variations of glaucoma, though open-angle glaucoma is by far the most prevalent.

  • Open-angle glaucoma – This version of glaucoma is responsible for approximately 90% of all cases. The eye’s drainage canals slowly clog, reducing the speed by which fluids drain from the eye. Over time, this increases intraocular pressure (IOP) and damages the optic nerve.
  • Angle-closure glaucoma – In this version of glaucoma, the eye’s drainage canals have narrow angles. This prevents eye fluids from properly draining, rapidly increasing IOP. This is one of the only forms of glaucoma that has noticeable symptoms (nausea, vomiting, eye pain, headache).
  • Normal-tension glaucoma – Also called “low tension glaucoma”, this variant of glaucoma occurs despite normal IOP.
  • Secondary glaucoma – Glaucoma that is the result of another injury or condition (such as diabetes2) is called secondary glaucoma. Secondary glaucoma can also form as a result of certain medications (most notably, steroids used to treat other eye conditions).
  • Congenital glaucoma – Sometimes the eye’s drainage canals do not form properly during pregnancy, causing congenital glaucoma.

Diagnosing Glaucoma – During a comprehensive eye exam, numerous tests will indicate the presence of glaucoma. Digital retinal imaging and ocular coherence tomography (OCT) both can create detailed images of the eye and its internal structures, including the optic nerve. We utilize both technologies to aid in our diagnosis.

Treating Glaucoma – Treatment is generally centred around lowering and controlling your IOP. This is most commonly done with topical medications (in the form of eye drops), though oral medications may be used as well. However, oral medications have a much greater likelihood of side effects compared to eye drops.

A trabeculoplasty, done via laser or conventional surgery, is also effective at reducing IOP. However, surgery is considered a last resort due to its invasiveness and potential for complications.