mydriasis vs inborn reflex

mydriasis and inborn reflex both are nouns.

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

As nouns, inborn reflex is a hypernym of mydriasis; that is, inborn 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
inborn reflex: an automatic instinctive unlearned reaction to a stimulus

mydriasis (noun)	inborn 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