Morris M, Klett Z, Gieser S C, Couch J M, Hirsch J
Department of Ophthalmology and Visual Science, Yale University School of Medicine, New Haven, Connecticut 06510.
J Cataract Refract Surg. 1991 Jan;17(1):37-44. doi: 10.1016/s0886-3350(13)80982-0.
Preoperative contrast sensitivity functions (CSFs) were determined for 15 cataract patients using laser-generated patterns that effectively bypassed the optical components of the eye. These functions were compared with postoperative CSFs determined using traditional methods by transmission through the optics of the eye. Accurate prediction of postoperative contrast sensitivity occurred in 91% of the cases (ten of 11) for patients with preoperative visual acuity of 20/200 or better and in 67% of all the cases (ten of 15). Prediction failures occurred when the laser interferometer was not able to penetrate the cataract or when postoperative complications occurred. These results suggest that preoperative measurement of laser interferometric CSF is a useful predictor of postoperative CSF for patients with mild to moderate cataracts that can be bypassed by the laser and with better than 20/200 preoperative visual acuity. The problem of assessment when lens opacity is advanced is addressed in Part II.
使用能有效绕过眼睛光学组件的激光生成图案，为15名白内障患者测定了术前对比敏感度函数（CSF）。将这些函数与通过眼睛光学系统透射采用传统方法测定的术后CSF进行了比较。对于术前视力为20/200或更好的患者，91%的病例（11例中的10例）术后对比敏感度得到了准确预测，所有病例（15例中的10例）的准确率为67%。当激光干涉仪无法穿透白内障或出现术后并发症时，会出现预测失败的情况。这些结果表明，对于轻度至中度白内障且术前视力优于20/200、激光可绕过的患者，术前激光干涉测量CSF是术后CSF的有用预测指标。第二部分讨论了晶状体混浊严重时的评估问题。
