noun: the appearance of a red glow in the eyes of people in photographs. this effect can be reduced by camera settings
In darker conditions, the pupils of eyes of all living creatures dilate (widens) to take in more light. When the flash is used at this time, light reflects off the insides of the eye, making it appear red in photographs. The red-eye reduction system utilizes a flash of light which causes the pupils to constrict before the photo is taken, reducing the chances of red-eye in the final image.
In dark conditions, an effect is caused by light from a camera's flash reflecting off the blood vessels in the black of the eye. It can be reduced by making the room brighter, by using an off-camera flash, or by utilizing the red-eye reduction mode that some cameras and flashes offer.
Have you ever taken a picture and the subjects eyes are red? This is called Red-eye and is caused by light from a camera flash in a room that is dimly lit. The flash reflects off the blood vessels behind the retina in the eye.
Redeye is the term used to describe the red colour often visible people's eyes when a picture is taken with a flash. It is caused when the pupil of the eye is dilated - usually in a low light environment - and the light of the flash strikes the retina at the back of the eye, reflecting the light through the wide-open pupil. It is a common problem when the flash is positioned close to the lens, as it is on many small cameras. Bounced flash (with higher-end flashguns) helps avoid this.
Bright red eyes due to flash.
A phenomenon which occurs when the flash is fired directly into the subject's eye in a dimly lit or dark environment. Blood vessel in the back of the eye reflect their colour back through the iris of the eyewhich is usually opened wide in a dim light. Most digicams have a flash mode to reduce or eliminate this condition.
An effect caused by an electronic flash reflecting off of the human eye and making it look red. Compact cameras with the flash located close to the lens suffer the worst from this problem. Pro photographers use a bracket to hold an external flash unit above and off to the side of the lens to eliminate red-eye.
Red-eye is the term used to describe the effect that can occur in photographs where the pupils of the eyes can take on a red color. The red color appears when the pupil of the eye is dilated, usually in a low light environment when the light of the flash strikes the retina at the back of the eye, reflecting the light through the wide-open pupil. (Also see Red-eye Reduction)
You've all seen red-eye on those photos you used to get back after they were developed. It's caused by the light of the flash hitting the blood vessels at the back of the retina. The closer the flash is to the lens, the more likely this is to happen.
An effect that causes peoples eyes to look red in flash exposures.
The red discoloration of a photo's subjects' eyes, caused by the light of the flash bouncing off the retina in the back of the eye. Our online photo finishing tools can help you fix red-eye and other flaws.
The red glow from a subject's eyes caused by light from a flash reflecting off the blood vessels behind the retina in the eye. The effect is most common when light levels are low, outdoor at night, or indoor in a dimly-lit room.