DEFINITION:
Permanent loss of sight in both eyes, as confirmed by an ophthalmologist registered to practice in Canada. The corrected visual acuity must be worse than 20/200 in both eyes, or the field of vision must be less than 20 degrees in both eyes.

INTERPRETATION:
Blindness can result from injury, disease or degeneration of the eye, of the optic nerve or nerve pathways connecting the eye to the brain, or the brain itself. This definition covers blindness regardless of the cause. A legally blind individual could qualify under this definition.