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Article

Effects of Light on Visual Function, Alertness, and Cognitive Performance: A Computerized Test Assessment

by
Marcos Sánchez-Lacambra
1,
Elvira Orduna-Hospital
1,2,*,
María Arcas-Carbonell
1,2 and
Ana Sánchez-Cano
1,2,*
1
Department of Applied Physics, University of Zaragoza, 50009 Zaragoza, Spain
2
Aragon Institute for Health Research (IIS Aragon), 50009 Zaragoza, Spain
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2024, 14(15), 6424; https://doi.org/10.3390/app14156424
Submission received: 9 July 2024 / Revised: 21 July 2024 / Accepted: 22 July 2024 / Published: 23 July 2024
(This article belongs to the Special Issue Interdisciplinary Approaches and Applications of Optics & Photonics)

Abstract

Background: Three computerized tests were designed to evaluate visual function, alertness, and visuocognitive integration under three different lighting conditions (white, red, and blue lighting). Methods: Three computerized tests were designed and programmed using the experimental design software PsychoPy version 2023.2.2. Test 1 evaluated visual acuity (VA), Test 2 assessed contrast sensitivity, and Test 3 measured alertness. This study was conducted on 53 young subjects who performed three computerized tests after adapting to each of the three different lighting conditions. A baseline aberrometric measurement was taken before and after the tests for each lighting condition. Measurements of accuracy and reaction time were taken for each test, along with total, high-, and low-order aberration values for each situation. Results: Statistically significant differences (p ≤ 0.05) were found among the different lighting conditions across the three tests, with white lighting yielding better performance in Test 1 and Test 3. Additionally, the aberrometric analysis revealed significant differences (p ≤ 0.05), with the baseline measurement being more myopic. Conclusions: White lighting produced the best VA results and faster reaction times, whereas red lighting had poorer VA effects. These findings suggest that different lighting conditions induce changes in vision and alertness, although further research is needed to understand the underlying causes.
Keywords: aberrometry; alertness; blue light; computer tests; contrast sensitivity; lighting conditions; reaction time; red light; visual acuity; white light aberrometry; alertness; blue light; computer tests; contrast sensitivity; lighting conditions; reaction time; red light; visual acuity; white light

Share and Cite

MDPI and ACS Style

Sánchez-Lacambra, M.; Orduna-Hospital, E.; Arcas-Carbonell, M.; Sánchez-Cano, A. Effects of Light on Visual Function, Alertness, and Cognitive Performance: A Computerized Test Assessment. Appl. Sci. 2024, 14, 6424. https://doi.org/10.3390/app14156424

AMA Style

Sánchez-Lacambra M, Orduna-Hospital E, Arcas-Carbonell M, Sánchez-Cano A. Effects of Light on Visual Function, Alertness, and Cognitive Performance: A Computerized Test Assessment. Applied Sciences. 2024; 14(15):6424. https://doi.org/10.3390/app14156424

Chicago/Turabian Style

Sánchez-Lacambra, Marcos, Elvira Orduna-Hospital, María Arcas-Carbonell, and Ana Sánchez-Cano. 2024. "Effects of Light on Visual Function, Alertness, and Cognitive Performance: A Computerized Test Assessment" Applied Sciences 14, no. 15: 6424. https://doi.org/10.3390/app14156424

APA Style

Sánchez-Lacambra, M., Orduna-Hospital, E., Arcas-Carbonell, M., & Sánchez-Cano, A. (2024). Effects of Light on Visual Function, Alertness, and Cognitive Performance: A Computerized Test Assessment. Applied Sciences, 14(15), 6424. https://doi.org/10.3390/app14156424

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