Irritation that gets right into damaged retina? (9)
I believe the answer is:
eyestrain
'irritation' is the definition.
(I've seen this before)
'right into damaged retina?' is the wordplay.
'right' becomes 'yes' (right can mean yes or okay).
'into' is an insertion indicator.
'damaged' is an anagram indicator.
'retina' is an anagram of 'etrain'.
'yes' put inside 'etrain' is 'EYESTRAIN'.
'that gets' acts as a link.
(Other definitions for eyestrain that I've seen before include "Discomfort of sightseers" , "Possible effect of too much reading" , "Tiredness when reading" , "Optic stress" , "tiredness of pupils" .)