WHY EYES LOOK RED IN PHOTOS

The “red-eye effect” occurs when a camera captures light reflecting from the retina at the back of the subject’s eye when a flash is used at night and in dim lighting. Light rays travel through the cornea and pupil of the eye to focus on the retina, a layer of light-detecting cells at the back of the eye. From here, the retina converts the light rays into electronic pulses that travel along the optic nerve to the brain to create visual images. In fact the eye works very similar to the way a camera does. Light enters the clear covering of the eye, like the glass of a camera lens, and the pupil controls the amount of light that travels through the eye, like a camera aperture. The retina captur

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