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Related Experiment Video

Updated: Feb 12, 2026

Full-Field Optical Coherence Microscopy for Histology-Like Analysis of Stromal Features in Corneal Grafts
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Wide Corneal Epithelial Mapping Using an Optical Coherence Tomography.

Nauman Hashmani1, Sharif Hashmani1, Choudhry M Saad2

  • 1Department of Ophthalmology and Visual Sciences, Hashmanis Hospital, Karachi, Pakistan.

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Summary

This study mapped the corneal epithelium using a novel 9 mm diameter map, finding thickness variations by location and sex. Reproducibility was good to excellent, establishing a reference for healthy eyes.

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Area of Science:

  • Ophthalmology
  • Corneal Science
  • Optical Coherence Tomography

Background:

  • The corneal epithelium plays a crucial role in maintaining ocular health and visual function.
  • Accurate mapping of corneal epithelial thickness is essential for diagnosing and managing various eye conditions.
  • Novel algorithms and wide-diameter mapping techniques offer potential advancements in corneal imaging.

Purpose of the Study:

  • To map the corneal epithelium across a 9 mm diameter using a new algorithm.
  • To investigate the influence of age, sex, and axial length on corneal epithelial thickness.
  • To assess the reproducibility of this corneal mapping technique.

Main Methods:

  • Epithelial thickness was calculated in 220 healthy individuals using spectral-domain optical coherence tomography (SD-OCT) with a new commercial algorithm.
  • Inclusion criteria focused on normal eyes with refractive errors between +5 and -6 diopters, excluding specific ocular conditions and systemic diseases.
  • Reproducibility was evaluated in 50 individuals.

Main Results:

  • The central corneal epithelium was thicker than the periphery, except in the nasal zone.
  • The inferior quadrant was the thickest, while the superior quadrant was the thinnest.
  • Males generally exhibited thicker corneal epithelium, with weak negative correlations observed between age and thickness in specific peripheral zones. No significant relationship was found with axial length.

Conclusions:

  • This study provides a comprehensive map of the corneal epithelium in healthy eyes using a novel, wide-diameter mapping technique.
  • The findings establish a valuable reference for future research on corneal structure and variations.
  • The demonstrated good to excellent reproducibility supports the clinical utility of this mapping method.