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Related Experiment Video

Updated: Aug 9, 2025

Enrichment of Bruch's Membrane from Human Donor Eyes
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Published on: November 15, 2015

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Myopic macular Bruch's membrane defects.

Songhomitra Panda-Jonas1,2, Gerd U Auffarth1, Jost B Jonas1,3,4

  • 1Department of Ophthalmology, University of Heidelberg, 69120 Heidelberg, Germany.

Heliyon
|February 16, 2023
PubMed
Summary
This summary is machine-generated.

Bruch's membrane defects (BMDs) are common in elongated eyes, correlating with scleral staphylomas. These defects show distinct RPE and scleral thinning, suggesting a link to myopic macular degeneration.

Keywords:
Axial myopiaBruch’s membraneBruch’s membrane defectsMyopiaMyopic macular degenerationMyopic maculopathy

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Area of Science:

  • Ophthalmology
  • Histopathology
  • Retinal Research

Background:

  • Axially elongated eyes are susceptible to posterior segment pathologies.
  • Bruch's membrane defects (BMDs) are increasingly recognized in high myopia.
  • Understanding BMD morphology is crucial for diagnosing myopic macular degeneration.

Purpose of the Study:

  • To histologically characterize macular Bruch's membrane defects (BMDs).
  • To investigate the relationship between BMDs and axial elongation.
  • To compare BMD morphology with adjacent retinal layers and sclera.

Main Methods:

  • Histomorphometric analysis of enucleated human globes.
  • Light microscopy examination for BMDs in 247 eyes.
  • Correlation analysis of BMD prevalence and size with axial length and scleral staphylomas.

Main Results:

  • BMDs were found in 6.1% of eyes, predominantly in the macular region of axially elongated eyes (27.0-36.0 mm).
  • BMD prevalence and size significantly correlated with increased axial length and scleral staphylomas.
  • BMDs exhibited larger gaps than the retinal pigment epithelium (RPE) and smaller gaps than inner retinal layers, with absent choriocapillaris and RPE within the defect and localized scleral thinning.

Conclusions:

  • BMDs are characterized by specific RPE and scleral thinning patterns, associated with scleral staphylomas in myopic eyes.
  • The findings suggest BMDs are linked to absolute scotomas and retinal nerve fiber layer stretching.
  • Axial elongation-induced stretching of Bruch's membrane is a likely etiology for BMD formation.