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Related Experiment Video

Updated: Feb 20, 2026

Comparison of Three Clinical Stereoscopic Methods for Measuring Binocular Visual Function During Amblyopic Treatment in Unilateral Amblyopia

Comparison of Three Clinical Stereoscopic Methods for Measuring Binocular Visual Function During Amblyopic Treatment in Unilateral Amblyopia

Published on: September 27, 2024

Asymmetrical accommodation in hyperopic anisometropic amblyopia.

Sonia Toor¹, Anna M Horwood^2,3, Patricia Riddell²

¹Academic Unit of Ophthalmology and Orthoptics, University of Sheffield, Sheffield, UK.

The British Journal of Ophthalmology

|October 21, 2017

Summary

This summary is machine-generated.

Most children with hyperopic anisometropic amblyopia exhibit asymmetrical accommodation, with some showing unusual "anti-accommodation." This asymmetry often resolves with spectacle correction, indicating a potential treatment pathway.

Keywords:

Vision child health (paediatrics)optics and Refraction

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Published on: March 3, 2023

Area of Science:

Ophthalmology
Pediatric Optometry
Vision Science

Background:

Hyperopic anisometropic amblyopia is a common cause of reduced vision in children.
Understanding accommodative behavior is crucial for managing amblyopia.

Purpose of the Study:

To investigate asymmetrical accommodation in children with hyperopic anisometropic amblyopia.
To assess the prevalence of different types of accommodative asymmetry, including anti-accommodation.

Main Methods:

Simultaneous measurement of accommodation and vergence using a PlusoptiX SO4 photorefractor.
Study included 26 children (4-8 years) with hyperopic anisometropic amblyopia and 13 age-matched controls.
Participants viewed a detailed target moving in depth.

Main Results:

81% of anisometropes showed asymmetrical accommodation without spectacles.
58% exhibited aniso-accommodation, and 23% showed 'anti-accommodation' (reversed response).
Anti-accommodation resolved with spectacle correction; vergence gains were typical.

Conclusions:

The majority of hyperopic anisometropic amblyopes display non-consensual asymmetrical accommodation.
Anti-accommodation, a significant finding, was observed in about one in four children.
Spectacle correction appears to normalize accommodative responses in these cases.