Vision Impairment Terminology

noun a word that is the name of a person, place, thing, or idea; in this case, 'bat' is a noun referring to a flying mammal

adjective a word that describes or modifies a noun; in this case, 'blind' is an adjective describing the bat's inability to see

preposition a word that shows the relationship between a noun (or pronoun) and other words in a sentence; in this case, 'as' is a preposition indicating the comparison between the blindness of the person and a bat

• The patient's vision was as blind as a bat due to the advanced stage of retinal degeneration.
• I can't find my keys in this dark room, I'm as blind as a bat!
• She's as blind as a bat without her glasses on.
• His lack of awareness about the situation made him as blind as a bat.