Elderly woman smiling sitting while sitting down.

Eye diseases

Sight loss can be caused by eye problems present from birth, conditions that appear later in life, infections, or environmental factors. Learn more about the main causes of sight loss in children and adults 

Diagram of a person with crossed eye

Turned Eyes (Strabismus)

Strabismus is the medical term for misalignment of the eyes two eyes that are not straight. It occurs in at least 5% of the population.
Optometrist checking a child's eye

Lazy Eye - Amblyopia

Amblyopia ('lazy eye') happens when the vision in one eye doesn't develop properly in early childhood.
eye floaters on a blue background

Floaters and Flashing Lights

Floaters are dark specks in the form of dots, circles, lines, or cobwebs that seem to move across your field of vision. They are most noticeable when you are looking at a light-coloured background, such as a clear sky or a white wall.
Amsler grid

Check Your Vision: the Amsler Grid

This simple screening tool is used for monitoring for early signs of wet AMD.
Bald gentleman with goatee looking in mirror.

Dry eye

Dry eyes happens when your don't make enough tears. Learn more about dry eyes.
An older man and younger woman looking at price tags in a grocery store

Age-related macular degeneration

Age-related macular degeneration (AMD) is the most common cause of sight loss among Canadians over 50. Learn more about AMD.
Older female holds a magnifier to a package. She is standing in front of another woman who is helping her with the magnifier.

Cortical visual impairment

Cortical visual impairment (CVI) is sight loss caused by neurological damage. Learn more about CVI.
A close-up of a girl climbing up a tree, smiling at the camera

Congenital eye conditions

Congenital eye conditions are present at birth and can affect your eyes or sight. Learn more about congenital eye conditions.
Head shot of a university-aged woman with library stacks behind her.

Retinal diseases

Retinal diseases are a group of eye conditions that affect the retina. Learn more about retinal diseases.
Man in a red plaid shirt is holding his white cane to his side while reaching for the microwave.

Refractive conditions

Refractive condition can result in blurred vision and are very common. Learn more about refractive conditions.