nyctalopia

English Thesaurus

1. inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder (noun.state)

hypernym	:	avitaminosis, hypovitaminosis,
definition	:	any of several diseases caused by deficiency of one or more vitamins (noun.state)

hypernym	:	vision defect, visual defect, visual disorder, visual impairment,
definition	:	impairment of the sense of sight (noun.state)