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| Author | Subject: CAG |
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 ts
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CAG
Jul 02, 2005 14:51:07 In CAG...why is there a semi dilated, often vertically oval pupil? |
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jonesal2
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RE: CAG
Jul 02, 2005 18:34:43 semi dilated because this is where pupil block occurs
verticaly oval - good question to which I don't know thw answer, my guess would be something to do with the vascularisation of the iris possibly?? |
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Michael
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RE: CAG
Jul 02, 2005 22:06:43 Pupil block is most common when pupil is mid-dilated. However, it remains mid-dilated, irregular and unresponsive during ACG due to segmental ischaemia of its musculature when the IOP approaches 50 mmHg - exceeds artial pressure so no blood can flow into iris.
As for why it is most commonly vertically oval, I agree totally with JonesAL2, its a very good question, though note that other appearances are possible. I also suspect it is due to the pattern of the iris' blood supply. |