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A common pathway for developmental glaucomas.

M B Shields1

  • 1Duke University Medical Center, Department of Ophthalmology, Durham, North Carolina.

Transactions of the American Ophthalmological Society
|January 1, 1987
PubMed
Summary
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High iris insertion is a key finding in developmental glaucoma, linked to embryonic development issues. This defect may cause aqueous humor outflow obstruction, leading to increased eye pressure.

Area of Science:

  • Ophthalmology
  • Developmental Biology
  • Genetics

Background:

  • Developmental glaucoma encompasses a group of inherited eye conditions characterized by increased intraocular pressure.
  • Anomalies in the anterior chamber angle are frequently observed in various forms of congenital glaucoma.

Purpose of the Study:

  • To investigate the clinicopathologic features of developmental glaucoma, focusing on anterior chamber angle abnormalities.
  • To identify common defects and potential mechanisms underlying aqueous outflow obstruction in developmental glaucoma.

Main Methods:

  • A clinicopathologic study of ten patients with developmental glaucoma.
  • Histologic specimens were acquired using a modified trabeculectomy technique.
  • Literature review of developmental disorders associated with anterior chamber angle abnormalities.

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Main Results:

  • A high insertion of the iris was observed in four types of developmental glaucoma.
  • This abnormality of the anterior chamber angle was also found in other developmental disorders.
  • The common defect is hypothesized to originate from a developmental arrest during the third trimester of gestation.

Conclusions:

  • A high iris insertion is a significant finding in developmental glaucoma, potentially stemming from abnormal development of neural crest-derived tissues.
  • Aqueous outflow obstruction may result from paradoxical collapse of the trabecular meshwork and Schlemm's canal or additional developmental abnormalities in the outflow system.