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Updated: Jun 28, 2025

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Higher order aberrations in keratoconus‏.

Nir Erdinest1, Naomi London2, David Landau1

  • 1Department of Ophthalmology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel.

International Ophthalmology
|April 9, 2024
PubMed
Summary

Keratoconus, a corneal disorder causing poor vision, is characterized by significant higher-order aberrations. Early detection through advanced diagnostics is crucial for timely treatment and improved patient outcomes.

Keywords:
Early detectionEctasiaHigher order aberrationsKeratoconusVisual disturbanceWavefront

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Area of Science:

  • Ophthalmology
  • Corneal Disease
  • Vision Science

Background:

  • Keratoconus is a progressive corneal disorder causing thinning, ectasia, and irregular astigmatism, leading to poor visual acuity.
  • Keratoconic corneas exhibit significantly higher levels of ocular aberrations compared to healthy eyes, causing visual disturbances even in early stages.

Purpose of the Study:

  • To review the aberrations associated with keratoconus.
  • To discuss methods for measuring these aberrations.
  • To explore treatments for minimizing their impact.

Main Methods:

  • Technological advancements enable early detection of pre-clinical keratoconus features.
  • Key diagnostic indicators include corneal surface elevations, pachymetry, epithelial patterns, wavefront aberrations, and biomechanics.
  • This review synthesizes current knowledge on keratoconus-related aberrations.

Main Results:

  • Higher-order aberrations are a hallmark of keratoconus, exceeding those in normal eyes.
  • Various pre-clinical features can differentiate keratoconic from normal eyes at early stages.
  • Understanding these aberrations is key to early diagnosis and management.

Conclusions:

  • Early diagnosis of keratoconus allows for prompt treatment, potentially halting disease progression and improving long-term prognosis.
  • Identifying keratoconus patients is critical due to contraindications for refractive surgery.
  • Timely intervention can significantly enhance visual outcomes for keratoconus patients.