Change colours, perhaps, to hide electronic flaw in photo

I believe the answer is:

redeye

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'change' is the definition.
(redeye is a kind of change)

I cannot understand how the remainder of the clue works.

(Other definitions for redeye that I've seen before include "Describes the first flight in the morning" , "Flash-induced effect on photo" , "early flight" , "Photographic fault" , "flash result" .)

I've seen this clue in The Telegraph.

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