The randomly selected control subjects consisted of 66 age matched patients with no retinal vein obstruction and no refraction default. Axial lengths were measured by the same person using the same technique.In patients with retinal vein occlusion the axial length of the affected eyes were compared with the other healthy unaffected eyes, and also with the control eyes. Statistical analyses were performed by paired t and Student's t tests.Statistical significance was considered as p<0.05. The means were given with their standard error (SEM) and difference between the two means were compared within the 95% confidence interval. ResultsOf the 17 patients with CRVO, 1 1 were women and six were men. Their ages ranged between 55 and 73 years with a mean of 63.87 (SEM