VST Glaucoma Center, L V Prasad Eye Institute, Banjara Hills, Hyderabad, Andhra Pradesh, India.
J Glaucoma. 2010 Dec;19(9):650-4. doi: 10.1097/IJG.0b013e3181ca7f9a.
To assess the agreement among clinical, Heidelberg Retina Tomograph (HRT), and optic disc photography in the optic disc diameter measurement.
Prospective, observational study of 55 eyes of 55 subjects who underwent horizontal and vertical optic disc diameter measurements with +90 diopter lens on slit-lamp biomicroscopy (clinical) and on HRT and optic disc photography. Measurements were compared and agreement among the methods was assessed using intraclass correlation coefficients and Bland and Altman plots.
Mean vertical diameter measured by clinical (1.93±0.28 mm) and on disc photography (1.9±0.22 mm) were comparable (P=0.812) and both were significantly greater (P<0.0001) than that measured on HRT (1.69±0.20 mm). Mean horizontal diameter by clinical (1.82±0.19 mm) and on disc photography (1.79±0.22 mm) were comparable (P=0.789) and both were significantly greater (P<0.01) than that measured on HRT (1.66±0.16 mm). The 95% limits of agreement on Bland and Altman plots ranged from 0.54 mm (clinical and disc photography) to 0.93 mm (clinical and HRT) for vertical diameter measurements and from 0.51 mm (HRT and disc photography) to 0.63 mm (clinical and HRT) for horizontal diameter measurements. Proportional bias was detected in the agreement between clinical and HRT as well as clinical and disc photography in vertical disc diameter measurement.
Agreement between clinical and disc photography for optic disc diameter is better than that between either of these 2 methods and HRT. With the increasing disc size, there is an increasing disagreement in the vertical disc diameter measurements between the clinical and HRT as well as clinical and disc photography.
评估临床、海德堡视网膜断层扫描仪（HRT）和眼底照相在视盘直径测量中的一致性。
前瞻性、观察性研究，纳入 55 例 55 只眼，对其行水平和垂直视盘直径测量，分别采用+90 屈光度裂隙灯生物显微镜（临床）、HRT 和眼底照相。对这些方法进行比较，并使用组内相关系数和 Bland-Altman 图评估方法间的一致性。
临床（1.93±0.28mm）和眼底照相（1.9±0.22mm）测量的垂直直径平均值相近（P=0.812），且均显著大于 HRT 测量值（P<0.0001）（1.69±0.20mm）。临床（1.82±0.19mm）和眼底照相（1.79±0.22mm）测量的水平直径平均值相近（P=0.789），且均显著大于 HRT 测量值（P<0.01）（1.66±0.16mm）。Bland-Altman 图的 95%一致性界限范围，在垂直直径测量中，从 0.54mm（临床和眼底照相）到 0.93mm（临床和 HRT）；在水平直径测量中，从 0.51mm（HRT 和眼底照相）到 0.63mm（临床和 HRT）。在垂直视盘直径测量中，临床与 HRT 以及临床与眼底照相之间的一致性存在比例偏差。
临床与眼底照相对视盘直径的一致性优于这两种方法与 HRT 之间的一致性。随着视盘尺寸的增加，临床与 HRT 以及临床与眼底照相之间在垂直视盘直径测量中的差异也越来越大。
