Red eye is a red disk that commonly appears in the center of they eyes in certain
flash photographs.
This phenomenon is caused by using an on-camera flash to photograph a subject looking directly into the camera. The red disk in the pupil of the eye is actually a reflection of the flash from the back of the eye. Some cameras attempt to reduce this reflection by prefiring the flash just strongly enough to get the subject's pupils to contract before taking the photograph.
flash photographs.
This phenomenon is caused by using an on-camera flash to photograph a subject looking directly into the camera. The red disk in the pupil of the eye is actually a reflection of the flash from the back of the eye. Some cameras attempt to reduce this reflection by prefiring the flash just strongly enough to get the subject's pupils to contract before taking the photograph.
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