Background: RT (Reaction time) is the interval time between the presentation of a stimulus and the initiation of the muscular response to that stimulus. Aim of the study was to compare visual reaction time for Red and Green colors in the first year medical students. Material & Methods: Total 120 first year M.B.B.S students in age group of 17-24 yrs both male and females were selected .Visual Reaction time was recorded by using audiovisual Reaction time apparatus designed by Anand agencies Pune. The study was carried out in the research lab, Department Of Physiology, Vikhe Patil Medical College, between 3 to 5 pm. Result: Data was analyzed by unpaired “t” test we found that visual Reaction time for Red and Green colors were statistically significant both in male and female (p<0.05) visual reaction time for red color light is faster than green color light both in males and females. Conclusion: Thus our study results showed visual reaction time for green color was significantly more than red color. This could be because individual color mental processing time for green color is more than red color.

Keywords: Green Color; Red Color; Reaction Time; Visual Reaction Time; RT: Reaction Time; VRT: Visual Reaction Time.