blindness Definition

sightless

having less than 1/10 of normal vision in the more efficient eye when refractive defects are fully corrected by lenses

of or relating to sightless persons

a recurrent inflammation of the eye of the horse

reduced visual capacity in faint light (as at night)

deficiency of color vision ranging from imperfect perception of red and green to an ability to see only tones of yellow, blue, and gray

onchocerciasis

inflammation and photophobia caused by exposure of the eyes to ultraviolet rays reflected from snow or ice

affected with partial or total inability to distinguish one or more chromatic colors

insensitive, oblivious

not influenced by differences of race; especially : free from racial prejudice

infestation with or disease caused by filarial worms (genus Onchocerca); especially : a human disease marked by subcutaneous nodules, dermatitis, and visual impairment and caused by a worm (O. volvulus) found in Africa and tropical America which is transmitted by the bite of a female blackfly —called also river blindness