Clinical Optometry (Dec 2019)
Evaluation of Simple Visual Reaction Time of Different Colored Light Stimuli in Visually Normal Students
Abstract
Rasoul Amini Vishteh, Ali Mirzajani, Ebrahim Jafarzadehpour, Samireh Darvishpour Department of Optometry, Iran University of Medical Sciences, School of Rehabilitation Sciences, Tehran, IranCorrespondence: Ali MirzajaniDepartment of Optometry, Iran University of Medical Sciences, School of Rehabilitation Sciences, No. 24 Flat 2, 13th Alley, Behzad Hesari Street, Mirdamad Avenue, Tehran, IranTel +98 2122909608Fax +98 2122220946Email [email protected]: To evaluate the influence of colored light stimulus on simple visual reaction times.Methods: Simple visual reaction times of colored light stimuli were measured in 100 young Iranian females with the mean age of 23.02±3.45 years (range from 18 to 30 years) in response to the four visual stimuli (red, green, yellow and blue light) by using Speed Anticipation and Reaction Tester (SART) software.Results: The analysis of variance (ANOVA) test to compare visual reaction time showed a significant difference (P <0.001) between four colored light stimuli so that the maximum and minimum mean reaction times were obtained for blue- and red-colored light stimuli. Also, it was observed that the response latency for red color was significantly less compared to green color (P < 0.05).Conclusion: The present study showed that individuals do not respond to visual stimuli with different colors at the same speed, which may be due to different factors involved in the visual reaction time.Keywords: reaction time, the color of stimulus
