purblind vs sand-blind

purblind and sand-blind both are adjectives.

Word	Noun	Adjective	Verb	Adverb
purblind	No	Yes	No	No
sand-blind	No	Yes	No	No

As adjectives, purblind and sand-blind are synonyms defined as:

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

purblind (adjective)	sand-blind (adjective)
having greatly reduced vision	having greatly reduced vision
lacking in insight or discernment