Canon Powershot A650 IS User Manual page 144

142
Playback/Erasing
When there is not enough space left on the memory card,
red-eye correction cannot be performed.
Although you can apply red-eye correction any number of
times to an image, the image quality will gradually
deteriorate with each application.
Since the correction frame will not appear automatically on
images that have already been corrected once with the
(Red-Eye Correction) function, use the [Add Frame] option
to correct them.