Low-luminance visual acuity and low-luminance deficit: optimising measurement and analysis
Formal dark adaptation does not improve low-luminance visual acuity results since any increased sensitivity is nullified by extremely quick cone light adaptation times. Small reductions in background luminance levels are not a clinically significant source of variability. However, for consistency, the same luminance level should be maintained throughout testing. Results from electronic and physical charts are not transferrable without proper luminance calibration. A low-luminance deficit greater than 11 ETDRS letters, in younger individuals, should prompt further investigation.
Authors
- Laura J. Taylor (ORCID: https://orcid.org/0000-0001-7072-0853)
- Rehab Ahmed (ORCID: https://orcid.org/0000-0002-8197-7555)
- Jasleen K. Jolly (ORCID: https://orcid.org/0000-0001-9878-4621)
- Robert E. MacLaren (ORCID: https://orcid.org/0000-0002-3096-4682)
- Giovanni Forte (ORCID: https://orcid.org/0009-0006-7642-8080)
Institutions
- Nuffield Orthopaedic Centre (GB)
- University of Oxford (GB)
- Anglia Ruskin University (GB)
Publication Details
- Journal
- Clinical and Experimental Optometry
- Published
- 2025-02-26
- DOI
- https://doi.org/10.1080/08164622.2024.2448239
- Citations
- 2
- Primary Topic
- Impact of Light on Environment and Health
- Type
- article
- Field-Weighted Citation Impact
- 2.21
Funders
- National Institute for Health and Care Research
- NIHR Oxford Biomedical Research Centre