Topographic Measurement of the Optic Nerve Head with Confocal Scanning Laser Tomography in Normal Third Decade of Korean

Lee, Don Won; Ahn, Hee Bae; Rho, Sae Heun

Abstract

In glaucoma patients, optic nerve head analysis is very useful in early detection and progression during follow-up. Among optic nerve head analysis methods, the confocal laser tomographic scanner(Heidelberg Retina Tomograph: HRT) is actively studied for accurate and highly reproducible analysis.We analyzed the optic nerve head of 62 normal eyes(male 40 eyes, female 22 eyes) in third decade of Korean with HRT, and calculated the mean value of each parameters in HRT and evaluated the difference between men and women. We also studied the distribution fo the value of each parameter in normal third decade of Korean. In addition, for the parameters of Rim/Disc area ratio, we calculated the mean value in 6 divisions of optic nerve head.The mean value of Disc area was 2.039mm3, Cup area 0.593mm3, rim area 1.716mm3 and Cup/Disc area ratio 0.237. Rim volume, Maximal cup depth, Height variation contour, Mean retinal nerve fiber layer thickness, and Retinal nerve fiber layer cross sectional area were statistically different between men and women. For Rim/Disc area ratio, the maximal value was noted in nasal inferior(0.873) region, and the minimal value was in temporal(0.579) region. There was no statistically difference between men and women in Rim/Disc area ratio.