- A certification of colour vision shall be valid for a maximum period of six years.
- Signs of toxicity include: confusion, nausea, anorexia, and disturbance of colour vision.
- The colour blindness in the monkeys arises because full colour vision requires two versions of the opsin gene, which is carried on the X chromosome.
- Human cone-rod dystrophy sufferers are sighted at birth, but lose first their central colour vision in early adulthood, before slowly losing their peripheral black and white vision as well.
- Humans and old world monkeys have three different types of cones (trichromatic vision) while other mammals lack cones with red sensitive pigment and therefore have poorer (dichromatic) colour vision.
- "Diversity in colour vision testing methods and standards demonstrates the need to adopt more objective assessment techniques internationally," says CAA chief medical officer Sally Evans.