目的：对比分析CT和临床Emery方法对老年性白内障晶状体核分级。 方法：对111例132眼老年性白内障晶状体应用CT测定晶状体核CT值和Emery方法进行分级，分为CT组和Emery组,对比两组对应晶状体核分级的术后1d裸眼视力、1wk矫正视力，1d角膜水肿情况、实际超声能量（AP）、有效超声时间（EPT）。 结果：术后1d视力， Emery Ⅲ，Ⅳ组与CT Ⅲ，Ⅳ组比较，差异有统计学意义;Emery Ⅲ级核术中AP和EPT高于CT Ⅲ级核，Emery Ⅳ级核，AP，EPT均低于CT Ⅳ级核，差异有统计学意义;CT Ⅲ，Ⅳ级核较Emery Ⅲ，Ⅳ核术后1d角膜水肿程度有统计学差异。 结论：对于Ⅲ，Ⅳ级核CT核分级方法可以作为Emery核分级方法的有效量化指标而对核硬度进行分级。

AIM:To contrastively analyse CT and Emery methods for senile cataract lens nuclear grading. METHODS: Totally 111 cases(132 eyes)with senile cataract were graded by CT value of lens nucleus and Emery methods,they were divided into CT group and Emery group, the uncorrected visual acuity of the first day after operation,the corrected visual acuity of the first week after operation,corneal edema of the first day after operation,the actual power(AP) and the effective phaco time(EPT) of corresponding grade in two groups were compared. RESULTS:At 1 day after surgery,the vision had statistically significant differences between the EmeryⅢ,Ⅳ group and CTⅢ,Ⅳ group.For AP and EPT, EmeryⅢ group was higher than CTⅢ group, Emery Ⅳ group was lower than CT Ⅳ group, differences were statistically significant. At 1 day after surgery,the corneal edema had statistically significant differences between the EmeryⅢ,Ⅳ group and CTⅢ,Ⅳ group. CONCLUSION: For Ⅲ,Ⅳgrade nucleus,CT nuclear grading method can be used as an effective quantitative indicator of Emery nuclear grading to grade nuclear hardness.