LASIK vs eye surgery

LASIK and eye surgery both are nouns.

Word	Noun	Adjective	Verb	Adverb
LASIK	Yes	No	No	No
eye surgery	Yes	No	No	No

As nouns, eye surgery is a hypernym of LASIK; that is, eye surgery is a word with a broader meaning than LASIK:

LASIK: a refractive surgery procedure that reshapes the cornea, creating a corneal flap which contains both epithelial and deeper stromal tissues
eye surgery: any surgical procedure involving the eyes

Other hypernyms of LASIK include eye operation.

LASIK (noun)	eye surgery (noun)
a refractive surgery procedure that reshapes the cornea, creating a corneal flap which contains both epithelial and deeper stromal tissues	any surgical procedure involving the eyes