Comparison of effect of maximum activity and under maximume activity on the depth perception of students aged 12 to 15 of Rey city

In this study, the effect of two types of maximum and under maximum activities on the depth perception has been compared in students (12 to 15 years old). Hence, the number of 97 subjects volunteered to participate in study. After Enselen testing, 87 people who had 10/10 vision was chosen and randomly were divided into three groups of maximum activity, under maximum activity and control. After pretesting, maximum activity group performed test of 12 minutes running-walking. We selected people who could do it more than 2200 meters and their heart rate was Mean  1 SD. In the under Maximum activity group subjects performed test of 540 meters.We selected subjects who their hearts rate was Mean  1 SD. Depth perception device (manufactured by Lafayette Company) was used for assessment. The method of data analysis is repeated measure. The results showed that in binocular conditions there was significant difference between under maximum group and other groups (p=0.008). And also there was not a significant difference between the maximum and control groups. While in the right eye condition there was not significant difference between the three groups (p=0.085) and this shows that the difference in the binocular condition is effected by the type of activity on the non permier eye. Overall, this study shows that in under maximum activity condition, depth perception greatly impressed. And this important function of vision reduced. It seems because depth perception is a function of the brain, it is affected by changes in oxygen supply to the brain tissue and it leads to reduced performance.