Dr. Sherif El-Defrawy

Patient Resources

The Three O's of Eyes

Not sure about the difference between an ophthalmologist, an optometrist, and an optician? In this engaging white board animation, Sanjay Sharma MD, a professor of ophthalmology and epidemiology walks you through how the three work together to ensure that you receive the best care for your eyes.


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Macular Degeneration

The macula is a small central area of the retina. It allows you to read, drive and see faces. With macular degeneration, this area becomes damaged. There are 2 types of macular degeneration: the dry and wet type. Wet macular degeneration is a very serious problem because it can quickly cause blindness. It can be successfully treated with eye injections which deliver a drug to the back of the eye which shrinks blood vessels.


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If I Had Flashes and Floaters

Flashes and floaters are symptoms that you should not ignore. If you have these symptoms you need to be urgently seen by an eye doctor. While most patients with these symptoms simply have a shift in the jelly of the eye, approximately one in seven patients with new onset of floaters and flashes have a retinal tear. Tears in the retina need emergency treatment as they can lead to a retinal detachment- a potentially blinding condition.


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If I Had Blurry Vision

Blurred vision, which cannot be corrected by glasses needs to be assessed by an eye doctors. One of the most common causes of blurred vision is cataract. In this condition, the lens in the eye which focuses light rays becomes cloudy and blocks light from getting to the retina. If you have a cataract that interfered with your day to day activity, surgery may help. 


View Video (5:42)      

If I Had Diabetes

Diabetes can affect the small blood vessels located in the back of the eye. These changes can happen without you knowing about it, so it is very important to be screened for these problems. With high sugars blood vessels can leak and new blood vessels can grow. These changes can be treated with laser and eye injections. 


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If I Had a Mole in My Eye

You might have pigment spots on your skin that your doctor follows to make sure that they are not growing. You can also have pigmented spots in the back of the eye. These too need to be followed by an eye doctors to make sure they do not grow.


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How to Use Your Eye Drops

Eye drops are used to treat a number of eye conditions, including dry eye, glaucoma and inflammation. Some easy tips to using eye drops include looking up when you put them in, blinking the drops in and balancing the bottle on the bridge of the nose. Also putting pressure on the lid near the side of the nose bridge can lower the chance that the drop gets into the body’s circulation.


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About Glaucoma

All eyes have pressure in them to keep them round. If the eye pressure gets too high it can cause damage to the nerve that send signals from the eye to the brain. Your eye doctor will measure the eye pressure and closely examine the nerve to look for glaucoma. Glaucoma can be treated with drops, laser and surgery. 


View Video (1:39)      

About Optic Neuritis

If you notice that colours become faded out and you have pain when your eye moves around, you may be suffering from optic neuritis. In this condition, your optic nerve – the cable connecting the eye to the brain becomes inflamed.


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Dr. Sherif El-Defrawy
Johnson 6, Hotel Dieu Hospital,
166 Brock Street at Montreal Street.

Office hours (Mon-Fri):
8:00AM to 5:00PM.

(613) 544-3400, ext. 2225