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nictitating membrane |
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nictitating membrane see also membrana nictitans, third eyelid. nictitating membrane flap using the membrana nictitans (third eyelid) as a flap in the treatment of corneal ulcer by sewing the eyelid across the cornea. nictitating membrane prolapse occurs when the globe of the eye is depressed in the orbit, as in dehydration and emaciation. It is also a diagnostic sign of tetanus in many species; the membrane flicks across the eye whenever the animal is startled. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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