visual disorder vs visual defect

visual disorder and visual defect both are nouns.

Word	Noun	Adjective	Verb	Adverb
visual disorder	Yes	No	No	No
visual defect	Yes	No	No	No

As nouns, visual disorder and visual defect are synonyms defined as:

Other synonyms of visual disorder include vision defect, visual impairment.

visual disorder (noun)	visual defect (noun)
impairment of the sense of sight	impairment of the sense of sight