is a specific kind of: disability, disablement, handicap, impairment.

is a broader term that covers: amaurosis | amblyopia | ametropia | aniseikonia | anorthopia | aphakia | blindness, cecity, sightlessness | color blindness, color vision deficiency, colour blindness, colour vision deficiency | diplopia, double vision | day blindness, hemeralopia | hemianopia, hemianopsia | quadrantanopia | metamorphopsia | moon blindness, night blindness, nyctalopia | photoretinitis | detached retina, detachment of the retina, retinal detachment | scotoma | tunnel vision | xanthopsia ... show more.