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Updated: Jul 31, 2025

Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing
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Visual Acuity in Aniridia and WAGR Syndrome.

Michael A Krause1, Kelly L Trout2, James D Lauderdale3

  • 1Department of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA, USA.

Clinical Ophthalmology (Auckland, N.Z.)
|May 8, 2023
PubMed
Summary

Visual acuity is significantly worse in WAGR syndrome patients compared to aniridia patients. This difference in visual function highlights the variability of ocular involvement in these genetic conditions.

Keywords:
PAX6WAGR spectrumWAGR syndromeaniridiablindnessvisual impairment

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Area of Science:

  • Ophthalmology
  • Genetics
  • Medical Research

Background:

  • Aniridia and WAGR syndrome are genetic disorders affecting eye development.
  • PAX6 gene mutations are implicated in both conditions, but with varying severity.
  • Understanding visual acuity differences is crucial for assessing disease impact.

Purpose of the Study:

  • To compare visual acuity between aniridia and WAGR syndrome subjects.
  • To evaluate the impact of different PAX6 mutation types on visual function.
  • To correlate visual acuity with the severity of ocular phenotype.

Main Methods:

  • Retrospective comparative study of 25 aniridia and 25 WAGR syndrome subjects.
  • PAX6 nonsense mutations in aniridia vs. large deletion mutations in WAGR syndrome.
  • LogMAR visual acuity measurements analyzed statistically.

Main Results:

  • WAGR syndrome subjects had significantly worse visual acuity (LogMAR 1.51±0.99) than aniridia subjects (LogMAR 0.95±0.53).
  • Mean visual acuity in WAGR syndrome (20/500) met criteria for legal blindness, unlike aniridia (20/125).
  • Visual efficiency was markedly lower in WAGR syndrome (2%) compared to aniridia (34%).

Conclusions:

  • WAGR syndrome with multi-gene deletions shows poorer visual acuity than aniridia with nonsense mutations.
  • Visual acuity serves as an indicator of ocular involvement severity and phenotypic variability.
  • Findings emphasize the distinct impact of different PAX6 mutation types on visual function.