mydriasis vs reflex

mydriasis and reflex both are nouns.

Word	Noun	Adjective	Verb	Adverb
mydriasis	Yes	No	No	No
reflex	Yes	Yes	No	No

As nouns, reflex is a hypernym of mydriasis; that is, reflex is a word with a broader meaning than mydriasis:

mydriasis: reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs
reflex: an automatic instinctive unlearned reaction to a stimulus

mydriasis (noun)	reflex (noun)
reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs	an automatic instinctive unlearned reaction to a stimulus

mydriasis (adjective)	reflex (adjective)
	without volition or conscious control