Red eyes reduction

Red eyes effect is actually caused by a bright light striking at the back of the retina. The reflected light which the camera captured actually come from the blood vessels and hence, gives red eyes effect shown on the picture. Normally this can occur when you are at a low ambient light. To compensate for the low light, our eyes dilate or open up to allow more light so that we can see clearer. At this condition, if a flash is fired at the eyes, our eyes will not have the time to react to contract or close up. This causes red eyes effect. Almost most of the cameras are equipped with a red eyes reduction that eliminates red eyes effect. What red eyes reduction does is it will flash two times. One is before the picture is taken to allow the eyes to contract so as to reduce red eyes. Two is after the picture is taken.

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