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Association between Vision-Related Difficulties in Low Light Levels and Visual Fields in Glaucoma.

Maanasi Mahalingam1, Jason Charng2, Vanessa T S Tang3

  • 1Department of Optometry & Vision Science, School of Health and Clinical Sciences, University of Western Australia, Perth, Western Australia, Australia.

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Summary

Self-reported difficulties in low light are linked to binocular visual field loss in glaucoma patients. The Low Luminance Questionnaire (LLQ) captures these challenges, which standard tests may miss.

Keywords:
GlaucomaIntegrated visual fieldsNight visionQuality of lifeSurveys and questionnaires

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Area of Science:

  • Ophthalmology
  • Vision Science
  • Clinical Research

Background:

  • Glaucoma is a leading cause of irreversible blindness.
  • Visual field loss in glaucoma can impact daily activities, especially in low light.
  • Standard clinical tests may not fully capture functional vision deficits.

Purpose of the Study:

  • To investigate the association between self-reported visual difficulties in low lighting and the severity of binocular visual field loss in individuals with primary open-angle glaucoma (POAG).

Main Methods:

  • A cross-sectional study analyzed data from 128 POAG participants.
  • Monocular visual fields were integrated into a binocular integrated visual field (IVF).
  • The Low Luminance Questionnaire (LLQ) and Glaucoma Quality of Life-15 (GQL-15) were used to assess self-reported difficulties.

Main Results:

  • Visual field indices correlated with log-transformed composite LLQ scores.
  • Inferior IVF defects were significantly associated with self-reported difficulties in low light conditions, including driving.
  • Breakpoints in visual field sensitivity were identified, indicating thresholds for reporting difficulties.

Conclusions:

  • Self-reported low light difficulties are partially explained by binocular visual field status in glaucoma.
  • The LLQ effectively identifies functional vision deficits in low light not detected by standard clinical assessments.
  • These findings highlight the importance of considering low light challenges in glaucoma patient care.