Re: [OM] 4Ti Oh, Oh - revisited

[Giles]

I think you are probably right and it is the flash reflection.

I remember a rather old design of catseye road markings reflector that was 
simply a sphere of glass.  A sphere acts as a retroreflector. Reflective 
paints and signs use the same principle and contain myriad minute glass 
spheres.

The human eyeball is fairly spherical so is probably acting as a 
retroreflector to some degree.

Giles

Mickey Trageser wrote:

> I always thought that the white eye syndrome was actually the flash
> reflection off the back of the eye's lens. Doesn't seem to happen as much
> as red eye, I assume due to the need for a very specific angle of
> reflection. That would depend on the subject looking directly at the
> camera lens, and the flash/distance ratio providing the correct angle of
> reflection.
> 
> Just my crazy idea...

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