pupillary membrane

(redirected from membrana pupillaris)

pu·pil·lar·y mem·brane

remnants of the central portion of the anterior layer of the iris stroma (the iridopupillary lamina) that occludes the pupil in fetal life, and normally atrophies about the seventh month of gestation. Persistent strands usually stretch across the pupil from one iris collarette to the other, without touching the pupillary margin. Failure to regress is a rare cause of congenital blindness.
Farlex Partner Medical Dictionary © Farlex 2012

pu·pil·la·ry mem·brane

(pyū'pi-lar-ē mem'brān)
A membrane that develops from mesenchymal tissue posterior to the cornea; it occludes the pupil and usually atrophics during the seventh month of pregnancy.
Synonym(s): membrana pupillaris [TA] , Wachendorf membrane (1) .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


Eberhard J., German botanist and anatomist, 1702-1758.
Wachendorf membrane - the protoplasmic boundary of all cells that controls permeability and may serve other functions through surface specializations. Synonym(s): cell membrane; pupillary membrane
Medical Eponyms © Farlex 2012
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