Persistent pupillary membranes are the result of remnants of the tunica vasculosa lentis, a vascular network that surround the lens during embryogenesis. They can vary in presentation from a few fine iris strands bridging the pupil to intricate webs with attachments to the lens.
Ophthalmic Atlas Images by EyeRounds.org, The University of Iowa are licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.
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