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Related Concept Videos

Accessory Structures of the Eye01:17

Accessory Structures of the Eye

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Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
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Updated: Apr 18, 2026

Author Spotlight: Unraveling the Molecular Mechanisms in PCO and Fibrosis Following Cataract Surgery
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Persistent pupillary membrane and accessory iris membrane in cataract surgery.

Ya-Feng Cheng1, Hung-Yu Lin1,2,3, Shih-Chun Chao1,3,4

  • 1Department of Ophthalmology, Show Chwan Memorial Hospital, Changhua, Taiwan.

Taiwan Journal of Ophthalmology
|April 17, 2026
PubMed
Summary

Persistent pupillary membrane (PPM) and accessory iris membrane (AIM) are congenital anomalies. This case report details their concurrent presence during cataract surgery, which proceeded without complications, emphasizing individualized patient assessment.

Area of Science:

  • Ophthalmology
  • Congenital Ocular Anomalies

Background:

  • Incomplete involution of the anterior tunica vasculosa lentis is common in newborns.
Keywords:
Accessory iris membranecataractpersistent pupillary membrane

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  • Persistent pupillary membrane (PPM) and accessory iris membrane (AIM) are congenital ocular anomalies resulting from this incomplete involution.
  • While often asymptomatic, PPM and AIM can complicate cataract surgery.