Many Compact cameras and some SLR cameras have built-in flash.The flash cannot be detached from these cameras and may result in "red eye" that is,the pupils of a subject's eyes appear red in coloue photographs.
Red-eye occurs when the light from the flash is reflected off the back of the retina.Subjects pupils are dilated and the On-Camera flash actually illuminates the blood vessels in the eye.The only way to avoid this is to close down the pupils i.e.contract the iris by raising the room lights,or using "red eye reduction flash mode".
This feature is available in sophisticated compacts.This mode fires a pre-flash or a bright lamp prior,thereby reducing the affect.In compacts where there is no red-eye reduction feature,the following technique may be employed to reduce the red-eye effect.The flash light may be bounced off the ceiling or wall,before it reaches the subject.
Red-eye occurs when the light from the flash is reflected off the back of the retina.Subjects pupils are dilated and the On-Camera flash actually illuminates the blood vessels in the eye.The only way to avoid this is to close down the pupils i.e.contract the iris by raising the room lights,or using "red eye reduction flash mode".
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