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目的 评价并比较4 0岁以上人群中正常人及青光眼患者的视盘大小。设计 以人群为基础的横断面调查研究。研究对象 源于北京地区人群为基础的眼病调查,评价4 0岁以上受检者清晰的眼底照片,其中正常人3918例,原发性青光眼135例。方法 被调查者均接受视力、裂隙灯、眼底照像等眼科检查。应用独立样本t检验比较正常人及青光眼两组视盘的大小。主要指标 测量视盘的垂直径和水平径,计算视盘平均直径和视盘面积。结果 正常人视盘的垂直径为(1 97±0 19)mm ,水平径为(1 78±0 18)mm ,平均直径为(1 87±0 17)mm ,视盘面积为(2 77±0 5 1)mm2 (1 4 2～6 4 2mm2 )。小视盘平均直径≤1 6 1mm ,大视盘平均直径≥2 15mm ,中视盘平均直径介于二者之间。青光眼视盘垂直径为(1 93±0 2 0 )mm ,水平径为(1 83±0 2 4 )mm ,平均直径为(1 88±0 2 0 )mm ,视盘面积为(2 80±0 5 9)mm2 (1 6 3～5 0 3mm2 )。正常人与青光眼患者的视盘平均直径(P =0 6 7)、视盘面积(P =0 5 2 )均无显著性差异。结论 人群中视盘大小变异较大,正常人与青光眼患者的视盘大小无明显差异。
Objective To evaluate and compare the optic disc size of normal and glaucoma patients over the age of 40 years old. Design a population-based cross-sectional survey. The study population originated from the population-based eye disease survey in Beijing and evaluated the clear fundus photographs of subjects over 40 years of age, including 3918 normal subjects and 135 primary glaucoma. Methods All subjects underwent visual examination, slit lamp, fundus photography and other eye examinations. The independent sample t-test was used to compare the size of optic disc in both normal and glaucoma groups. The main indicators measure the vertical diameter and horizontal diameter of the optic disc, calculate the average disc diameter and optic disc area. Results The diameter of the optic disc in normal subjects was (1 97 ± 0 19) mm, the horizontal diameter was (1 78 ± 0 18) mm, the average diameter was (1 87 ± 0 17) mm and the optic disc area was (2 77 ± 0 5) 1) mm2 (1 4 2 ~ 6 4 2mm2). The average diameter of small discs ≤ 1 6 1mm, the average diameter of large discs ≥ 2 15mm, the average diameter of the optic disc between the two. The vertical diameter of glaucoma optic disc was (1 93 ± 0 2 0) mm, the horizontal diameter was (1 83 ± 0 2 4) mm, the mean diameter was (1 88 ± 0 2 0) mm and the optic disc area was (2 80 ± 0 5 9) mm2 (1 6 3 ~ 5 0 3mm2). There was no significant difference in mean optic disc diameter (P = 0 6 7) and optic disc area (P = 0 52) between normal and glaucoma patients. Conclusion The size of the optic disc in the crowd is quite variable. There is no significant difference in the optic disc size between the normal and glaucoma patients.