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題名 | 高度近視眼視神經盤型態上之變化=The Optic Disc Morphometric Changes in High Myopia |
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作者 | 施永豐; 凌雲志; 王清泓; 林隆光; 黃兆康; 洪伯廷; | 書刊名 | 慈濟醫學 |
卷期 | 8:2 1996.06[民85.06] |
頁次 | 頁97-102 |
分類號 | 416.765 |
關鍵詞 | 視神經盤; 高度近視; 電射掃描系統; Optic disc; High myopia; Laser scanning system; |
語文 | 中文(Chinese) |
中文摘要 | 近視眼之視神經盤變異相當大,尤其高度近視之視神經盤到底和近視有 何關連。本篇收集台大新生高度近視(≧-8.0D)113例,及低度近視(<-3.0D)患者57 例。每一例均有詳細之睫狀肌麻痺後屈光度,角膜弧度及眼軸長之資料。再經詳 細之TopSS雷射眼底掃描系統對視神經盤進行照相及分析。結果高度近視患者之 視神經盤略偏向橢圓直立狀。其平均垂直直徑為2.05±0.39mm,水平直徑為1.81 ±0.41mm,而視神經盤平均面積為3.02±1.14mm�插A很明顯地,均比低度近視患 者為大。而視神經陷凹和視神經C/D比值,高度近視及低度近視並未有明頭之差 異。而且視神經盤傾斜度(tilt)和平均深度也和近視屈光度、眼軸長無關。但視神 經陷凹之傾斜度反而在高度近視患者較淺。由以上高度近視視神經盤之多種變異 來看,視神經盤大小確實隨近視度數之增加而變大。這可能和先天因素或由於後 天對後極部的拉扯而造成的,仍有待進一步研究。(慈濟醫學1996;8:97-102) |
英文摘要 | The optic nerve head and its surroundings demonstrate a wide variety of changes in myopia. However, thechanges of the optic nerve in high myopia still remain obscure. Thus, we decided to explore these changes by using alaser scanning image analyzer system. One-hundred-and-thirteen young high myopic patients (>-8.0D)from NationalTaiwan University were enrolled in this study. Fifty-seven low myopic students (<-3.0D) were enrolled as controls.The eyes ofeach patient were measured for refractive error and axial length. The morphometric parameters of theoptic disc were measured by using stereoview color slides and a TopSS laser scanning disc analyzer. The resultsshowed that the optic disc tends toward a vertically ovoid shape in high myopia. The mean vertical diameter of the discwas 2.05±0.39 mm and its horizontal diameter was 1.81±0.41 mm. The total area of the disc was 3.02±1.14 mm��. Theoverall size of the optic disc (vertical diameter, horizontal diameter, and total area) and the neuroretinal rim wassignificantly greater than that of low myopic patients (p< 0.05). The cup/disc ratio, however, was not significantlyhigher in high myopic patients (p> 0.1). Tilling and the average depth of disc were not correlated with the increases ofrefractive error and axial length. In contrast, the sloping of the disc became slightly shallower as myopia increased.Therefore, the increase of the optic disc size with an increase of the myopia imply that two factors (either congenital oranactive pulling of the tissues toward the posterior pole) might causethis change.(Tzu Chi Med J 1996; 8: 97-102) |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。