" blindness "

[Adjective]  | "blind" | \ ˈblīnd \

1: lacking or deficient in sight; specifically : having less than ⅒ of normal vision in the more efficient eye when refractive defects are fully corrected by lenses

2: of, relating to, or designed for persons lacking or deficient in sight

3: unable or unwilling to discern or judge

Origin: before 12th century ;

 Middle English blind, blend, going back to Old English blind, going back to Germanic *blinda- (whence also Old Frisian & Old Saxon blind "blind, sightless," Old High German blint, Old Icelandic blindr, Gothic blinds), adjective derivative from the dialectal Indo-European verbal base *bhlendh- "become murky or cloudy, see: poorly" {mat|blend:1|};

[Noun]  | "color blindness" 

1: the quality or state of being colorblind: such as

2: partial or total inability to distinguish one or more chromatic colors

3: the act or practice of treating all people the same regardless of race

Origin: 1844 ;

 {see: |colorblind|colorblind} + {see: |-ness|-ness}, after blindness;

[Noun]  | "moon blindness" 

1: a recurrent inflammation of the eye of the horse

Origin: circa 1720 ;

[Noun]  | "night blindness" 

1: reduced visual capacity in faint light (as at night)

Origin: 1625 ;

[Noun]  | "red-green color blindness" 

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

Origin: 1888 ;

[Noun]  | "river blindness" 

1: onchocerciasis

Origin: 1952 ;

[Noun]  | "snow blindness" 

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

Origin: 1748 ;

[Noun]  | "on*cho*cer*ci*a*sis" | \ ˌäŋ-kō-ˌsər-ˈkī-ə-səs \

1: 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

Origin: 1911 ;

 New Latin Onchocerca, genus of filarial worms (from oncho-, probably erroneously for onco-, from Greek ónkos "barb of an arrow" + -o- {see: |-o-|-o-} + -kerka, feminine of -kerkos "having a tail [of the kind specified]," adjective derivative of kérkos "tail") + {see: |-iasis|-iasis} {mat|angle:2|}, {mat|cercus|};

  * Note : The genus Onchocerca was introduced by the Austrian zoologist Karl Moriz Diesing (1800-67) in a brief Latin description of the worm Onchocerca reticulata appended to an article by J. Hermann, "Trichina, bei einem Pferde gefunden," Oesterreichische medicinische Wochenschrift, 1841, no. 9 (February 27), p. 199-200. Diesing's coinage is presumed to mean "hook-tailed," on the assumption that his oncho- is a mistake for onco-, but nothing in the description renders this self-evident. Perhaps the reference is to the spicule (copulatory organ) of the male.;

[Noun]  | "blindness" 

[Adjective]  | "blind"