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Related Experiment Video

Updated: Jul 31, 2025

Scleral Cross-linking Using Riboflavin and Ultraviolet-A Radiation for Prevention of Axial Myopia in a Rabbit Model
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IMI-Nonpathological Human Ocular Tissue Changes With Axial Myopia.

Jost B Jonas1,2, Richard F Spaide3, Lisa A Ostrin4

  • 1Department of Ophthalmology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.

Investigative Ophthalmology & Visual Science
|May 1, 2023
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Summary
This summary is machine-generated.

Nonpathological myopia causes significant eye shape changes, including thinning of the retina, choroid, and sclera. These ocular characteristics are crucial for understanding myopia progression and its impact on vision.

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Area of Science:

  • Ophthalmology
  • Anatomy
  • Physiology

Background:

  • Myopia, or nearsightedness, is a common refractive error characterized by the eye's inability to focus distant objects clearly.
  • Axial elongation is a primary mechanism in myopia development, leading to significant anatomical changes in the eye.

Purpose of the Study:

  • To detail the nonpathological, or typical, structural and cellular characteristics of the human eye associated with myopia.
  • To provide a comprehensive understanding of ocular changes during myopic axial elongation.

Main Methods:

  • Histomorphometric analysis of ocular tissues.
  • Clinical studies evaluating refractive and anatomical parameters.

Main Results:

  • Axial myopia transforms the eye from spherical to prolate, decreasing photoreceptor and retinal pigment epithelium cell density and retinal thickness, especially posteriorly.
  • The choroid and sclera thin, particularly at the posterior pole, with scleral remodeling.
  • Bruch's membrane (BM) thickness is independent of axial length, but its volume increases. BM opening shifts, leading to absence in temporal regions and altered optic disc shape in moderate myopia. High myopia shows enlarged BM openings, optic discs, and thinning of peripapillary structures.

Conclusions:

  • Detailed characterization of ocular changes in nonpathological myopia is essential.
  • Understanding these changes aids in elucidating mechanisms of myopic axial elongation and pathological alterations.
  • This knowledge is vital for comprehending the visual function consequences of myopia.