Development of a Method to Potentially Substitute Direct Evaluation of Mesopic Visual Acuity in Drivers

Marta Garcia-Rojo, Cristina Bonnin-Arias, Eva Chamorro, Cristina Alvarez-Peregrina and Celia Sanchez-Ramos
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Marta Garcia-Rojo: Optometry and Vision Department, Facultad de Óptica y Optometría, Avda, Arcos de Jalón 118, 28037 Madrid, Spain
Cristina Bonnin-Arias: Optometry and Vision Department, Facultad de Óptica y Optometría, Avda, Arcos de Jalón 118, 28037 Madrid, Spain
Eva Chamorro: Neuro-Computing and Neuro-Robotics Research Group, Universidad Complutense de Madrid, Avda, Arcos de Jalón 118, 28037 Madrid, Spain
Cristina Alvarez-Peregrina: Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, 28670 Madrid, Spain
Celia Sanchez-Ramos: Optometry and Vision Department, Facultad de Óptica y Optometría, Avda, Arcos de Jalón 118, 28037 Madrid, Spain

IJERPH, 2021, vol. 18, issue 9, 1-10

Abstract: (1) Background: In mesopic lighting conditions, or under adverse environmental circumstances, visual information is reduced, which increases the risk of traffic accidents. This effect could be reduced with a precise evaluation of the visual function under mesopic conditions, but it is difficult to replicate in clinics. This study aims to develop an easy-to-adopt method to evaluate mesopic visual acuity (VA) in drivers. (2) Methods: Prospective and observational study in drivers. logMAR mesopic VA was compared with photopic VA measured under different combinations of contrast charts and filters to find the combination that responds best to mesopic conditions. (3) Results: Fifty-six drivers were examined. The best correlation was found with an 80% density filter and a Weber contrast chart of 20%. The logMAR VA for this combination was 0.01 ± 0.11, which was close to the mesopic VA values (0.01 ± 0.12). The difference between both logMAR VA was 0.00 ± 0.06 (R = 0.86; p ? 0.001; ICC = 0.86). (4) Conclusions: The use of 20% contrast optotypes and the interposition of an 80% filter under photopic conditions provide VA values similar to those measured under mesopic lighting conditions, making this simple system a good predictor of mesopic VA values.

Keywords: mesopic visual acuity; photopic visual acuity; contrast; night driving; aging; driver behavior; vision (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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