Patient Education →

Understanding Glaucoma: The Silent Thief of Sight

Updated: 28/02/2026

Quick Summary:Glaucoma is called the “thief of sight” because it can damage your vision slowly without symptoms. It affects side vision first, so most people don’t notice until significant damage has occurred. Risk factors include age over 40, family history, Afro-Caribbean ethnicity, and diabetes. Regular eye exams can detect glaucoma early through pressure checks, visual field tests, and OCT scans. Early treatment with eye drops or laser can prevent serious vision loss. Don’t wait—early detection saves sight.

Glaucoma has been called the thief of sight as it seems to rob you of your vision, but did you know that it changes your vision 5 years before you even notice? Read on to learn about this possible devastating eye disease.


Glaucoma is a group of eye diseases that can cause someone to lose their vision. The pressure in your eye becomes too high for that eye that it presses on delicate cells in the back of your eye causing them to die off. 32% of all blindness in people over 40 in Trinidad and Tobago is due to Glaucoma.

The problem is the first batch of cells to die off are the ones that help you see to your side. This is why we do not notice these changes as most of our daily tasks are central tasks. It is only when we start to bump into people on the street, have problems driving the car or have difficulty going up and down stairs that people start to know they have a problem but by then damage could have already happened!

But did you know, this eye disease could be picked up sooner by regular eye exams?

Who is at risk of this eye disease?

The most common type of Glaucoma is called Primary Open Angle Glaucoma (POAG). The risk factors are:

-People over the age of 40

-People with a family history especially brothers and sisters

-People of Afro-Caribbean ethnicity

-People with Diabetes


How is it picked up?

Nowadays with modern technology, there are many ways for it to be detected.

Pressure check=> You may be familiar with the “puff of air” test at the optometrist’s. Some people dread this test, that’s why there are new ways of measuring pressures without the puff!

Visual Field Test=>This machine checks how far you can see to the side. This is an important test to have down. Some people think it is boring, but it is vital to have it done!

OCT=>This is like an ultrasound but using light and it tells us if those delicate cells have been damaged many years before you would know!

What can be done if I have it?

If it is picked up on time, the treatment is normally eye drops or a laser procedure. If it is not picked up on time, the Ophthalmologist may need to use many drops or even complicated surgery. The best thing is to get it picked up as soon as possible by having regular eye exams especially if you have a risk factor.

Other types

Other types of Glaucoma are similarly devastating but not as common. Closed-angle glaucoma is when the pressure rises in the eye suddenly, leading to a painful eye. This needs immediate attention!

Diabetes can also cause a special type of Glaucoma so please keep your diabetes under control.

Whilst Glaucoma is a lifelong disease that needs to be managed for the rest of your life it doesn’t have to be a life sentence especially when it is picked up on time.

Remember, your eyes are irreplaceable, and early detection is the key to preserving your vision. Don’t let Glaucoma be the thief of your sight.

Schedule an eye exam today and take the first step in preserving your eyesight.

💡 Clinical Guidance

"Patients at risk should have comprehensive eye exams at least once a year. Tests include eye pressure measurement, side vision (visual field) assessment, and OCT imaging to detect early cell damage. If glaucoma is diagnosed, treatment may involve prescription eye drops, laser therapy, or surgery in advanced cases. Control of underlying conditions like diabetes is essential. Sudden eye pain or vision changes require urgent assessment. Lifelong monitoring is needed, but early detection ensures the best chance of preserving vision."

EC

Reviewed by EyeCare360 Optometrists

Professional clinical guidance and patient education provided by licensed Optometrists in Trinidad & Tobago.

Our Clinical Standards →
At EyeCare360 you are the centre of our focus.

Continue Learning

80% of all vision loss is preventable!

Unlocking the Power of Prevention: Defying the Odds Against Vision Loss In healthcare, there’s a profound truth that often goes unnoticed—the majority of vision loss is preventable. An astounding 80%! Let’s look into this fact and understand how the journey to preserving eyesight begins with proactive choices. The Alarming Reality: A Call to Action Vision…

Cataract – What exactly is a cataract?

If you think a cataract is a film that grows over your eyes, you are not alone! Many people think this is a cataract. However, a cataract is something that grows IN your eyes! Our eyes are nature’s camera, and they have a lens inside to focus on all the many things that we look…

Diabetes – It’s more than sugar!

Have you been told you have diabetes? Did the news shock you? Many people get told they have diabetes before they even know they have a problem! Let’s look at some early signs and what we need to do to manage this disease. Some signs that happen in early diabetes are: Drinking more water Going…