Taking pictures in dim or dark light sometime causes the flash to reflect off the subject’s eyes, illuminating the blood vessels in the retina, causing what we call “red eye”.
1. Ensure the red eye reduction function/feature on your camera is set to yes.
2. Try taking the picture without a flash.
3. Ask the subject not to look directly into the camera lens.
There are some subject’s where red eye will always be a problem. You can fix this with any photo program or just with the Windows photo viewing program. If you are viewing the picture from your camera SD card, the changes may be saved on the card as the original, so ensure you have a copy of the original before you make any changes, although most editing programs now have a revert tab to ensure you can undo the changes you have made.