Maguire L J, Bourne W M
Department of Ophthalmology, Mayo Clinic, Rochester, Minn.
Dev Ophthalmol. 1989;18:197-202. doi: 10.1159/000417115.
We used simple visual inspection of keratoscope mires to determine proper placement of corneal relaxing incisions in 4 patients with high postkeratoplasty astigmatism. Retrospectively, the LSU topography analysis system was used to evaluate the pattern of power distribution seen pre- and postoperatively in this group. Analysis of preoperative photographs showed that none of the patients had a classic spherocylindrical pattern of corneal power distribution. Areas of maximum steepening of corneal slope were often present in the peripheral portions of the graft away from the steep hemimeridians suggested by visual inspection of the keratoscope photographs. Since these areas were not recognized preoperatively, steepening remained in the areas postoperatively. These results suggest that preoperative computer analysis of keratoscope photographs may be superior to visual inspection of the photographs in determining proper placement of relaxing incisions.
我们通过角膜镜图像的简单目视检查，为4例角膜移植术后高度散光患者确定角膜松解切口的合适位置。回顾性地，使用路易斯安那州立大学地形分析系统评估该组患者术前和术后的屈光度分布模式。术前照片分析显示，所有患者均无典型的球面柱面角膜屈光度分布模式。角膜斜率最大变陡区域通常出现在移植片的周边部分，远离角膜镜照片目视检查提示的陡峭半子午线。由于这些区域术前未被识别，术后这些区域仍存在变陡情况。这些结果表明，术前对角膜镜照片进行计算机分析在确定松解切口的合适位置方面可能优于对照片的目视检查。
