When taking a picture, what causes the red eye effect?

And how can you avoid it from happening?

I have on my cam a button that said red eye, but even if I use it, some pple still get the red eye and I can't remove it with photoshop...I tried, it gets better but still doesn't look right.

Cameron C2009-07-18T23:07:03Z

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It's caused by the light of the flash reflecting of the retina of the subject's eyes.

Most modern digital cameras give of 4 to 5 lights before taking the actual photo, letting the pupils close a bit, reducing the red eye.

Other cameras have a secondary light that stay on for 2 to 4 seconds, also letting the pupils close a bit.

I you have a bargain digital camera or disposable camera, most likely they won't have these features. If you have a good $90 and up camera and can't find if it has these features or not, resort to the manual or the company's website.

I use HP Photosmart Premier to get rid of Red Eye. It makes it an ugly gray color, but at least it's not red. I don't know what to tell you.

Best of Luck.

Anonymous2016-02-27T00:30:10Z

It happens when your flash is too close to your lens. This causes the light from the flash to bounce off a person's retinas at just the right angle that it can be seen in the picture. Human retinas reflect back the color red. To solve the problem, use the preflash (causes pupils to constrict, blocking the flash), use software to color the red something else, have the person look somewhere else besides directly into the camera or simply mount a flash on the camera's hotshoe, which is usually well away from the lens.

saq4282009-07-18T22:56:05Z

The red color comes from light that reflects off of the retinas in our eyes, plus on most of today's point and shoot style digitals, the flash is too close to the shutter. Most flashes are quicker than the pupil's ability to contract because most of the time in low light situations, the pupils are fully dialated to allow more light. Most cameras now have a pre-flash or strobe that causes the pupil to contract before the shutter goes off to eliminate the light bouncing off the retina...or if you have an SLR camera, move the flash further away from the shutter.

Anonymous2009-07-18T23:43:42Z

Assuming you don't have the money to buy another camera with a better prestrobe to -reduces- (not eliminates) red eye, try taking another picture immediately after you take the first one.

Dj_DH2009-07-18T22:53:35Z

large pupils reflecting the flash.. some cameras have an extra flash before the real flash wich closes the pupil to eliminate red eye.. to eliminate the red eye with photoshop just paint all the red black in the eye when you zoom in on it... sometimes it looks weird because of a lack of glossiness to the eye though.. but thats the best your gonna get without a special camera designed for it

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