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Paralysing an eye

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Paralysing an eye

Postby TheVirus » Mon Dec 14, 2009 6:19 pm

Hey, i've seen in many medical shows that when a patient's eye is paralysed with medication it seems to change colours (the iris turns black as far as i've seen). Does this really happen when someone's eyes are paralysed? If it does happen, do u know why?
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Re: Paralysing an eye

Postby zami'87. » Tue Dec 15, 2009 11:18 am

pupil widens(that's why eyes seem black),iris can't contract..for example because of oculomotor nerve damage.

http://en.wikipedia.org/wiki/Pupillary_light_reflex
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Re: Paralysing an eye

Postby TheVirus » Wed Dec 16, 2009 2:06 am

zami'87. wrote:pupil widens(that's why eyes seem black),iris can't contract..for example because of oculomotor nerve damage.

http://en.wikipedia.org/wiki/Pupillary_light_reflex

But, how does the fact that it can't contract affect the colour?
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Postby JackBean » Mon Dec 21, 2009 7:56 pm

the color of iris as itself is not affected, but the pupil is wide and seems to be black ;)
http://www.biolib.cz/en/main/

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Postby TheVirus » Mon Dec 21, 2009 10:37 pm

Oh, i see. Thanks.
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