| The Normal Values of Optic Disc Parameters According to the Optic Disc Size. |
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Gae Rang Kwon, Changwon Kee, Kyung Ja Shin, Myung Hee Shin, Byung Heon Ahn |
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Department of Ophthalmology, College of Medicine, Sung Kyun Kwan University, Samsung MedicalCenter, Seoul, Korea. |
| 시신경유두 크기에 따른 시신경유두 파라미터의 정상치 |
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권계량(Gae Rang Kwon),기창원(Chang Won Kee),신경자(Kyung Ja Shin),신명희(Myung Hee Shin),안병헌(Byung Heon Ahn) |
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| Abstract |
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We analysed the optic nerve head of 151 normal eyes with 8 confocal scanning laser ophthalmoscope (TopSSTM, Laser Diagnostic Technologies, Inc.), and obtained the normal values of each parameters. As the optic disc size increases, the cup shape, effective area, 1/2 depth area, C/D ratio, neuroretinal rim area, volume above, volume below, and 1/2 depth volume also increase. Therefore we obtained the normal values of these parameters according to the optic disc size. The entire subjects were divided into four groups according to the disc area, each group of 1. 5mm2-2.0mm2, 2.0mm2-2.5mm2, 2.5mm2-3.0mm2, and 3.0mm2-3.5mm2`, respectively. The normal values of other parameters such as contour variation, rnean contour depth, average depth, maximum depth, average slope, and maximum slope which are not affected by optic disc size were obtained without grouping. This may minimize the error in evaluating the optic disc parameters and may be useful in the early detection of glaucomatous optic disc changes. |
| Key Words:
Confocal scanning laser ophthalmoscope;Normal value;Optic disc pararneter;Optic disc size |
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