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Red Eye


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#1 nolvorite

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Posted 26 December 2013 - 02:32 PM

So what exactly causes Red eye in photographs? I know it only happens when it's dark outside, but does it also happen if there's decent lighting?


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#2 Photographa

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Posted 26 December 2013 - 02:38 PM

Good question!

 

When a flash fires, our pupils can't constrict fast enough to block out that light. Since we're in a dark scene (where we're using flashes) our pupils are very dilated. That light goes to the back of our eyes (it's red back there because of the blood) and it bounces back and exists our eyes, reflecting the red color.

 

Why is it that only the camera sees this red? It's kind of like shining a laser at a mirror. This red light reflects straight back, so when the flash and the lens are very close, we get the red-eye effect.


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#3 Amy

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Posted 28 December 2013 - 02:11 AM

It's so odd to realize that red eye happens because we're seeing red light reflecting from the inner eye.

 

I guess the way to prevent red-eye would be to use a flash that's farther away from the lens?


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#4 Mr.Panos

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Posted 28 December 2013 - 03:17 AM

I have the same problem and I believe that it is a very common issue. I don't know what the problem is, but the new technology have already found the solution. Many devices can easily delete the red eyes. For example, I have noticed this awesome feature in my iPad ( 4th generation ) and in my iPhone ( 5S ). Also, I think that the Dual LED flash on the new iPhone plays an important role because it decreases the amount of red eyes. I don't know why and I don't really care.
Photographa, you know so much about photography, congratulations my friend, I don't even know how to edit a picture, haha.
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#5 lorcan

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Posted 28 December 2013 - 02:14 PM

It used to be such a problem for photgraphers, but now it is so easy to correct, that its not a bother anymore, and its great you can fix it on youre iphone and you have apps and other stuff to fix it. It makes life so much easier. However with film you still have to be careful and always make sure the lightning is good.


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#6 Piew1956

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Posted 08 June 2015 - 09:42 AM

I may be wrong, but my impression is that you gave her the vitamins after the eye became red? In any case, I would have a vet check her out.
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