What question did this study set out to answer?

This research aims to determine if both eyes should be fogged during static retinoscopy for accurate measurements.

March 21, 2026

Static Retinoscopy Results With and Without a Fogging Lens Over the Non‐tested Eye

Key Points

This research aims to determine if both eyes should be fogged during static retinoscopy for accurate measurements.
Conducted static retinoscopy on young patients (N=50, mean age=9 years, 4 months)
Compared outcomes with and without a fogging lens over the non-tested eye
Analyzed results specifically for hyperopic patients.
No significant differences found in general retinoscopy measures
In hyperopic patients, not using a fogging lens led to a significant underestimate of refractive status (p < .001)
Findings challenge the use of lens bar during retinoscopy in vision screenings.

Abstract

ABSTRACT This study addressed the question: “Should both eyes be fogged during static retinoscopy?” Static retinoscopy measures were taken on young patients. (N=50; mean age=9 years, 4 months). Outcomes revealed no differences except with hyperopic patients, where the lack of a fogging lens over the partner eye resulted in a significant underestimate (p <.001) of the refractive status. This argues against the use of a lens bar for retinoscopy especially in vision screening programs involving young children.

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