Eye Library – F.A.Q
What Does 20/20 Vision Mean?
The sharpness of your vision is measured at a distance of 20 feet; so if you have 20/20 vision, it means you can clearly see what most individuals should be able to see at 20 feet. As such, 20/20 vision doesn’t imply perfect vision.
What is Amblyopia?
Amblyopia is also known as lazy eye. It occurs during the early stages of life, usually before 6 years of age. It is not a disease and it doesn’t cause blindness, but the central vision is impacted—the peripherals remain intact. This results in a poor link between the eye and the brain, causing a “lazy” eye.
What is Astigmatism?
When your cornea or lens is irregularly shaped (more oval than round), it causes blurred vision at every distance. This is called astigmatism. It is not a disease and clear vision can be achieved with eye glasses or contacts.
What is Colour Deficiency?
Usually incorrectly called colour blindness, colour deficiency is when you have a hard time deciphering colours and shades. It can be inherited or be the symptom of trauma or disease. Some affected individuals can’t identify red and green shades while others can’t identify blue and yellow shades.
What is Presbyopia?
Presbyopia is when you find it difficult to focus on objects close to you. This happens because the crystalline lens of your eye has become inflexible (for your eye to focus, elasticity is needed). Often, prescription reading glasses, bifocals, trifocals or contact lenses will correct presbyopia.
What us Cataracts?
A cataract refers to the eye’s lens when it becomes cloudy in appearance, thereby impairing vision as light cannot focus on the retina to produce clear images. There are several variations of cataracts, but most are due to the lens’ chemical makeup being altered and may be a sign of disease. Three common types of cataracts are:
- Cortical cataract
- Nuclear cataract
- Posterior capsular cataract
What is Glaucoma?
In Canada, glaucoma is the second leading cause of blindness. It classifies a set of disorders where the eye tissue damage is at least partly caused by pressure, or sometimes called intra-ocular pressure (IOP). Early detection via regular eye exams is ideal for treating glaucoma, as the condition’s symptoms are gradual and subtle, and if not identified, glaucoma can cause blindness.
What is Macular Degeneration?
The part of your eye that illustrates fine details like face recognition is the central vision, and this is the part of the eye that is affected by macular degeneration (ARMD). With ARMD, your peripheral vision remains clear but details will not be visible. This condition is mainly caused by age; those older than 50 years are at greater risk. Genetics, smoking, exposure to UV rays, high blood pressure, diabetes, arteriosclerotic vascular disease all increase your likelihood of developing ARMD. There are 2 main types of ARMD:
- Dry (a common form of ARMD and refers to the gradual breakdown of the retina’s light-sensing cells)
- Wet (a less common form of ARMD and is caused by the growth of abnormal blood vessels that bleed, damaging central vision)
Ontario Association of Optometrists
The Ontario Association of Optometrists (OAO) is the leading professional organization representing nearly 1,600 Doctors of Optometry in Ontario for over 100 years. Visit Website
Canadian National Institute for the Blind
CNIB is a registered charity, passionately providing community-based support, knowledge and a national voice to ensure Canadians who are blind or partially sighted have the confidence, skills and opportunities to fully participate in life. Visit Website
College of Optometrists of Ontario
The College of Optometrists of Ontario is the self-regulatory authority responsible for registering (licensing) and governing optometrists in Ontario. The College’s authority and limitations of its powers can be found in legislation including the Regulated Health Professions Act and the Optometry Act. Visit Website
The Canadian Association of Optometrists Visit Website
Doctors of Optometry Canada Visit Website
Burlington Chamber Of Commerce Visit Website