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

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 P...

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Bibliographic Details
Published in:Applied sciences 2024-08, Vol.14 (15), p.6424
Main Authors: Sánchez-Lacambra, Marcos, Orduna-Hospital, Elvira, Arcas-Carbonell, María, Sánchez-Cano, Ana
Format: Article
Language:English
Subjects:
aberrometry
alertness
blue light
Circadian rhythm
computer tests
contrast sensitivity
Design
Lighting
lighting conditions
Melatonin
Memory
Photoreceptors
Retina
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Summary: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.
ISSN:2076-3417
2076-3417
DOI:10.3390/app14156424