Correlation Of Branch Retinal Vein Occlusion And Ocular Axial Length, Anterior Chamber Depth

Objective: Branch retinal vein obstruction (BRVO) is a common vascular disorder, also is one of the blind eye diseases. Its etiology and risk factors are complex, usually occurs in the elderly with hypertension, arterios- clerosis, diabetes and other systemic diseases. The pathogenesis of branch retinal vein occlusion is believed to be the pathophysiological process, which is multiple factors involved in, at present still not very clear. This study is to explore the relationship between retinal vein occlusion and axial length and anterior chamber depth.Methods: Randomly selected from 45 patients (90 eyes), diagnosed in March 2009 to October 2010 at the First Affiliated Hospital of Dalian Medical University. Forty-five patients with BRVO (90 eyes), and 45 physical examinations whose eyes are normal in our hospital (90 eyes) were checked and grouped by fundus color photography and fluorescein angiography (FFA).The eyes with BRVO (45 eyes) into group 1, the fellow eyes (45 eyes) into group 2, the eyes of physical examination personnel (45 right eyes) into group 3, the eyes of physical examination personnel (45 left eyes) into group 4. The control group consisted of 45 patients for BRVO matched in age and sex. The axial lengths and anterior chamber depths of affected and fellow eyes of patients and controls were measured using IOL Master. The axial lengths and anterior chamber depths of affected and fellow eyes of patients and controls were recorded and analyzed statistically.Results: The mean axial length of the affected eyes in the BRVO group was (22.69±0.99)mm, and that of the fellow eye(s22.78±1.24)mm. The difference in axial length between the affected eyes and fellow eyes was not significant(t=0.355, P﹥0.05), the mean axial length of the right eyes in the control group was(23.38±1.32)mm, and that of the left eyes wa(s23.37±1.27)mm. The difference in axial length between the left eyes and right eyes in the control group was not significant(t=0.017, P﹥0.05), while the difference in axial length between the eyes with BRVO and the eyes in the control group was significant(t=-2.563, t=-2.663, P﹤0.05).The mean anterior chamber depth of the affected eyes in the BRVO group was(2.66±0.26)mm, and that of the fellow eyes(2.65±0.30)mm. The difference in anterior chamber depth between the affected eyes and fellow eyes was not significant(t=0.089, P﹥0.05), the mean anterior chamber depth of the right eyes in the control group was(2.56±0.29)mm, and that of the left eyes was(2.59±0.30)mm. The difference in anterior chamber depth between the left eyes and right eyes in the control group was not significant(t=-0.592, P﹥0.05). The difference in anterior chamber depth between the eyes with BRVO and the eyes in the control group was not significant(t=1.779, t=1.778, P﹥0.05).Conclusions: The shorter axial length could be a risk factor for BRVO. The relationship between anterior chamber depth and retinal branch vein occlusion remains to be further proved.