Talk:Pupil

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Goat

Notice that the tag on the goat reads 666. :: Does it have 6/6/6 vision? I'm sorry for all you feet users but this joke uses the metric system. ( And 20/20/20 just isn't funny.)::: Coming to think about it, It was probably added with a computer software.

Constriction of the pupils in certain situ. In need of more references

A little bit less important then Hell's evil goat, The last part of the article states that the pupil are affected by some situations(Flight or flight). Does anyone have a reference to that statement?

Dilation of the pupils in certain situations.

Does anyone know about dilation of the pupils when a person is in a situation in which they are frightened or in a situation of extreme fear? Thanks. -- Xer0X 12:44, 22 December 2005 (UTC)[reply]

You may want to see Flight or fight response, though it doesn't seem to have anything on the pupil specifically.

Oh, thanks for the link, the page is very interesting. But if anyone has an answer as to the effect of stressful situations (fear, fighting, etc...) on the pupils please take a quick minute to respond. --Xer0X 12:57, 22 December 2005 (UTC)[reply]

Your pupils dilate when you are frightened. From the article: "Dilation occurs when signals from sympathetic fibers cause the iris dilator muscles to contract". Sympathetic fibers are stimulated in stressful conditions. Strangely, I came here to know if the Hellsing OVA was wrong in having a surprised character's pupils contract.—The preceding unsigned comment was added by 70.81.44.238 (talk • contribs) 03:10, 19 April 2006 (UTC).[reply]

When the red-eye effect isn't red

According to the article, "When an eye is photographed with a flash, the iris cannot close the pupil fast enough and the blood-rich retina is illuminated, resulting in the red-eye effect." Yet when the photograph is of a cat, the effect is sort of a bluish-green, not red at all, even though cats' blood is as red as anyone else's. Why? Angr (talk • contribs) 15:21, 6 April 2006 (UTC)[reply]

I believe that this is because of a reflection off of the cat's eyes, but I could be wrong. --Xer0X 18:35, 6 April 2006 (UTC)[reply]

Other Cause of Dilation in Human

If you look at the reflection of your right eye in the mirror, and close your left eye, you will see your right pupil grow. This is probably why the world doesn't seem dimmer when you close one eye.—The preceding unsigned comment was added by Svendsgaard (talk • contribs) 22:17, 20 April 2006 (UTC).[reply]