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Related Experiment Video

Updated: Sep 20, 2025

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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Fixation Pattern Analysis With Microperimetry In Strabismic Subjects: A Pilot Study.

Myriam Milla-Barrios1, David P Piñero2,3, Ainhoa Molina-Martín2

  • 1Department of Optometry, OFTALVIST Alicante, Spain.

Seminars in Ophthalmology
|June 6, 2022
PubMed
Summary

Strabismus, with or without amblyopia, causes fixation instability. Microperimetry reveals significant differences in fixation patterns, correlating with visual acuity in strabismic patients.

Keywords:
Eye fixationfixation instabilitymicroperimetrystrabismic amblyopiastrabismus

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Vision Science

Background:

  • Strabismic amblyopia is a vision deficit from eye misalignment.
  • Understanding fixation patterns is crucial for strabismus management.

Purpose of the Study:

  • Analyze retinal fixation patterns in strabismus patients with and without amblyopia.
  • Compare these patterns to those in normal subjects.
  • Investigate the relationship between fixation and visual acuity.

Main Methods:

  • A prospective comparative study included 46 eyes (ages 3-16).
  • Three groups: persistent strabismic amblyopia, strabismus without amblyopia, and controls.
  • Microperimetry (MAIA system) assessed fixation indexes (P1%, P2%) and fixation areas (BCEA).

Main Results:

  • Significant differences in P2 fixation index between groups for dominant eyes.
  • P2 was significantly lower in the amblyopia group compared to controls.
  • Visual acuity correlated significantly with fixation indexes and areas.

Conclusions:

  • Strabismus, with or without amblyopia, is associated with fixation instability.
  • Microperimetry is a valuable tool for assessing fixation deficits in strabismus.