1. New photochromic spectacle lenses improve glare discomfort and photostress recovery
- Author
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Jacob B. Harth, Billy R. Hammond, Cameron J. Wysocky, and Lisa M. Renzi-Hammond
- Subjects
Optics. Light ,QC350-467 - Abstract
Purpose: To investigate the influence of a new photochromic spectacle lens on glare discomfort (GD) and photostress recovery time (PRT) in normal healthy subjects. A subject-masked within-subject comparison was performed using the fully activated state of Transitions® Gen STM and clear control. Methods: 30 participants (M = 19.2 ± 1.3 years) were tested. GD was assessed both physically, by measuring palpebral fissure size, and subjectively, via a 5-point Likert scale. PRT was measured as the amount of time necessary to regain visual function after an intense (∼15 % bleach) 5-second exposure to a broadband (emulated sunlight) light stressor. Results: GD, measured both physically and subjectively was significantly reduced (p
- Published
- 2025
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