People Pictures: How to Really Get Rid of the Dreaded Red Eye

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For years now, film and digital camera manufacturers have been forcing red-eye reduction mode on their customers. Its a series of bright, strobing flashes thats not only annoying to the people youre photographing, but doesnt even work very well.

What causes red eye? In a dimly lit room, the subjects pupil dilates, revealing more of the retina. The back of the retina has blood vessels over it, hence the red colour that is caused when the flash bounces of the back of the eye.

On cameras where the flash is close to the camera lens (as it almost always is), the light from the flash shines through the dilated pupil, bounces off the retina, and reflects as a red circle directly back into the lens. (the same thing happens to animals, too, except that the colour is sometimes green or orange instead of red.)

The best solution is to move the flash head away from the camera lens or use bounce flash. That way, the reflection from the retina doesnt bounce directly back at the camera. But on a camera that fits in your pocket, its not practical to achieve much separation of flash and lens.

Since camera makers couldnt move the flash away, they went to Plan B: firing the flash just before the shutter snaps, in theory contracting the subjects pupils, thereby revealing less retina.

Unfortunately, it doesnt work very well, and you may end up with red eye anyway. The other problem is that some people see the pre-flash as the picture being taken and then move while the shutter is open. Not a good result.

Basically you have three ways out of red eye. You can turn up the lights to help contract the subjects pupils. You could also use a camera that accepts an external, detachable flash. And if none of that works, remember that you can edit out red eye on your computer, using for example, the red eye reduction tools offered in many photo editing programs.

Looking for Australian stock photos. Check out the Australian photo library at Redbrickstock.com for high quality stock photos with rights managed or royalty free options.

81 thoughts on “People Pictures: How to Really Get Rid of the Dreaded Red Eye”

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