Review eyeball study (7)
I believe the answer is:
inspect
This clue might be a double definition.
'review' is the first definition.
(thesaurus)
'eyeball study' is the second definition.
'inspect' can be an answer for 'study' (I've seen this before). I'm unsure of the 'eyeball' bit.
Can you help me to learn more?
(Other definitions for inspect that I've seen before include "Look critically at" , "Go over" , "vet" , "Look over carefully" , "Look at closely" .)