依据IOLMaster白到白数据计算ICL长度的修正

Modified Method for Calculating the Length of ICL Based on White to White Distance Measured by IOLMaster

摘要: 目的：探讨依据IOLMaster白到白距离计算有晶体眼人工晶状体(ICL)长度的修正方法的准确性。方法：研究纳入12例双眼植入ICL的患者，一眼ICL长度直接按Staar在线计算系统确定，另一眼按修正方法确定ICL长度，双眼分别植入ICL后3个月测量ICL拱高，将合适的拱高定义为300~700 μm，未修正组和修正组拱高作配对T检验。结果：手术后3个月测量人工晶状体拱高，未修正组人工晶状体拱高为722.67 ± 94.35 μm，合适的拱高率为66.7%，修正组人工晶状体拱高为654.08 ± 37.07 μm，合适的拱高率为91.7%。未修正组和修正组的拱高行配对T检验，拱高差异有统计学意义(T = 2.95, P = 0.013)。结论：白到白距离IOLMaster测量值较实际值偏大，据此计算确定的ICL人工晶状体长度过大，引起拱高偏大。本研究所设计的修正方法确定的ICL人工晶状体长度更为合适，可以提高ICL人工晶状体的合适拱高率。

Abstract: Objective: To investigate the accuracy of the modified method for calculating the length of ICL based on white to white distance measured by IOLMaster. Methods: Twelve patients undergoing ICL implantation bilaterally were enrolled. The length of ICL in one eye was determined by the Staar online calculation system directly. And the length of ICL in another eye was determined by the modified method. Three months postoperatively ICL vault was measured. The vault between 300 and 700 μm was considered to be appropriate. Paired T test was conducted for vaults of the uncorrected and corrected groups. Results: The vaults of the uncorrected and corrected groups three months postoperatively were 722.67 ± 94.35 μm and 654.08 ± 37.07 μm respectively. And the appropriate vault rates of two groups were 66.7% and 91.7% respectively. The vaults of the uncorrected group were significantly larger than those of the corrected group (T = 2.95, P = 0.013). Conclusions: IOLMaster measurement of white to white distance was larger than the actual value. The length of ICL calculated based on the measurement was longer than needed. And that led to larger vault. The length of ICL determined by the modified method was more suitable, which could improve the appropriate vault rate of ICL.