night blindness vs vision defect

night blindness and vision defect both are nouns.

Word	Noun	Adjective	Verb	Adverb
night blindness	Yes	No	No	No
vision defect	Yes	No	No	No

As nouns, vision defect is a hypernym of night blindness; that is, vision defect is a word with a broader meaning than night blindness:

night blindness: inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder
vision defect: impairment of the sense of sight

Other hypernyms of night blindness include avitaminosis, hypovitaminosis, visual defect, visual disorder, visual impairment.

night blindness (noun)	vision defect (noun)
inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder	impairment of the sense of sight

night blindness vs vision defect

night blindness and vision defect both are nouns.

Words related to "night blindness"

Words related to "vision defect"