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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.
Ophthalmology. Glaucoma
|January 16, 2026
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.
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.
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