Effects of HEV-Filtering in a Soft Contact Lens on Contrast Sensitivity With and Without Veiling Glare.
Eye Contact LensJun 22, 2026 (epub)
Billy R Hammond, John R Buch, Patricia Martin et al.
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In 30 seconds
This randomized controlled trial evaluated the impact of high energy visible (HEV)-filtering contact lenses on contrast sensitivity function (CSF) in 40 participants aged 19-65. Results indicated that the HEV-absorbing lens significantly enhanced CSF compared to a clear lens, with least-squares mean differences of 0.3 under photopic and 0.14 under mesopic conditions with glare.
Key findings
- HEV-filtering lenses improved CSF by 0.3 under photopic conditions with glare.
- Under mesopic conditions with glare, CSF improved by 0.14.
- In the absence of glare, CSF improved by 0.26 under photopic and 0.28 under mesopic conditions.
Why it matters
Enhancing contrast sensitivity can improve visual performance, particularly in challenging lighting conditions. This is crucial for patient safety and quality of life, especially for those who rely on contact lenses.