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Updated: Jan 30, 2026

Three Different Protocols of Corneal Collagen Crosslinking in Keratoconus: Conventional, Accelerated and Iontophoresis
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Retinoscopy as a Screening Tool for Keratoconus.

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Retinoscopy is a highly sensitive and reliable method for detecting keratoconus, even in early stages. This eye examination can be effectively used in population-based screening programs for early keratoconus detection.

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Area of Science:

  • Ophthalmology
  • Corneal Diseases
  • Diagnostic Imaging

Background:

  • Keratoconus is a progressive eye condition characterized by thinning of the cornea.
  • Early detection of keratoconus is crucial for timely intervention and management.
  • Current screening methods may have limitations in sensitivity and accessibility.

Purpose of the Study:

  • To evaluate the diagnostic accuracy of retinoscopy for keratoconus detection.
  • To compare the reliability of retinoscopy against the Pentacam Scheimpflug camera, a gold standard imaging device.
  • To assess the potential of retinoscopy as a screening tool for keratoconus.

Main Methods:

  • Two masked retinoscopists assessed 123 patients (aged 10-30) for the scissoring reflex.
  • Patients also underwent vision testing, slit lamp examination, and Pentacam imaging.
  • Keratoconus diagnosis was confirmed by Pentacam using the Belin and Ambrósio Display (D index ≥2.69).

Main Results:

  • Retinoscopy demonstrated high sensitivity (97.7%) and specificity (79.9%) for keratoconus detection.
  • The negative predictive value was excellent (98.4%), indicating high reliability in ruling out the condition.
  • Excellent inter-rater reliability was observed between the two retinoscopists (Cohen's kappa = 0.84).

Conclusions:

  • Retinoscopy is a sensitive and reliable diagnostic test for identifying keratoconus, including early-stage disease.
  • The findings support the implementation of retinoscopy in population-based screening programs for keratoconus.
  • This accessible method can aid in the early identification and management of keratoconus.