The effect of primary colors on depth perception in patients with thalassemia major and comparison with healthy adolescents

The most severe form of thalassemia is beta thalassemia in which a person''s life is necessarily required regular blood transfusions and medical care. With starting treatments such as desferrioxamine injection and repeated blood transfusions، several complications is created in the patient''s vital organs، including eyes، the most important member of sensory. The vision is considerably more sensitive than other senses in perceptual - motor responses and it is also sensitive to details، depth and color. As a result، it has a decisive role in controlling movement. This study has been conducted to draw the effect of primary colors on depth perception in patients with thalassemia major and comparison with healthy adolescents. Research This method is a causal- comparison (Casual Comp rational) and the sample was 18 thalassemic patients and 18 healthy subjects in the age range 13 - 17 years (15/33± 1/41) who were selected through available sampling. These subjects have been evaluated three times in each colors by the depth، color & shape perception apparatus. The average of these three times tests was used as depth perception scores of people in that color. Results in repeated measures ANOVA showed that there are significant differences between the primary colors in both groups (p = 0 /0001، df=34 and F(2،34) = 62/564). Also the real effect of group was significant (p = 0 /0001، df=34 and F(1،34) = 14/334). According to the results، one of the probable reasons that affect loss of depth perception in thalassemia major was anemia، chronic hypoxia، inactivity or Increase iron deposition in tissues of the eye that has been observed in these people. Also according to different wavelengths، different colors have different depth perception، and the blue has the greatest error. It requires a solution in this regard due to the importance of depth and color perception in human motor behavior.