Red-eye effect

Red-eye effect is a common phenomenon in color flash photography, where the appearance of red pupils in eyes of individuals can be seen in photographs taken in low light conditions. This effect appears when the flash of the camera reflects off the blood vessels in the back of the eye, giving the eyes a red appearance.

Causes

The red-eye effect is caused by the reflection of light from the flash off the blood vessels in the back of the eye. This reflection is then captured by the camera, resulting in the red-eye effect. The effect is more pronounced in low light conditions, as the pupils are dilated to allow more light to enter the eye.

Prevention and Correction

There are several methods to prevent or correct the red-eye effect. Many cameras have a built-in red-eye reduction feature, which works by emitting a pre-flash that causes the subject's pupils to contract, reducing the amount of light that can reflect off the back of the eye. There are also software programs and applications that can digitally remove the red-eye effect from photos after they have been taken.

See Also

• Photography
• Flash (photography)
• Eye

References

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