dim-sighted vs visually impaired

dim-sighted and visually impaired both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dim-sighted	No	Yes	No	No
visually impaired	No	Yes	No	No

As adjectives, dim-sighted and visually impaired are synonyms defined as:

Other synonyms of dim-sighted include near-blind, purblind, sand-blind, visually challenged.

dim-sighted (adjective)	visually impaired (adjective)
having greatly reduced vision	having greatly reduced vision