Clearing Our Path

Creating accessible environments ­for people with vision loss

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Vision Loss Basics

Colour Blindness

Colour blindness is a partial or total inability to distinguish one or more colours from each other. There are three main kinds of colour blindness. The inability to distinguish red from green is the most common and occurs in men more often than women. Other major types are blue-yellow colour blindness and the complete absence of colour in vision (i.e., vision occurring in shades of black and white only).