"Visual disabilities range from mild or moderate vision loss in one or both eyes (“low vision”) to substantial and uncorrectable vision loss in both eyes (“blindness”). Some people have reduced or lack of sensitivity to certain colors (“color blindness”), or increased sensitivity to bright colors. These variations in perception of colors and brightness can be independent of the visual acuity."
From W3C Web Accessibility Initiative, "Diverse Abilities and Barriers."
This poster is made available by UK Home Office via a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International licence.