Comparative Study of Effectiveness between Color Blindness Test Plate and Traffic Light Simulator for Thai Driving License Test: Pilot Study

Abstract

Objective: To compare the effectiveness between color blindness test plate and traffic light simulator for Thai driving license test Materials and methods: A prospective, interventional pilot study was performed in 28 patients with color vision deficiency (age range 20-66 years). Each patient underwent color blindness exam with color blindness test plate and traffic light simulator. The patient is considred to have passed if he identifies all of the colors correctly from two out of three times Primary outcome measure was pass rate each of test. Chi-square statistical analysis was used to compare the results between 2 exams. Results: The results showed no statistically significant differences of the pass rate between the color blindness test and traffic light simulator (75% versus 64.3%, respectively ;p=0.383) In addition, the age and severity of color blindness were not different (p= 0.567, p=0.483, respectively) between passed and not passed groups. Conclusions: The color blindness test plate and traffic light simulator demonstrated equal efficacy for examining driving license in Thai individuals with color vision deficiency, supporting the use of color blindness test plate and traffic light simulator for Thai driving license examination.