方法：老年性白内障97例102眼随机分为3组，分别植入光变色人工晶状体(A组)，蓝光滤过人工晶状体组(B组)，普通人工晶状体(C组)，术后3mo利用多功能视力测试仪对3组患者分别测试在明视及暗视环境下的对比度视力。

结果：A组患者暗视时的3种对比度下的视力低于明视下的视力，但是在对比度下降到10%时这种差异才有统计学意义。B组和C组患者在3种对比度下暗视的对比度视力均低于明视下的对比度视力，差异有统计学意义。明视下A组和C组在100%，25%和10%对比度下的对比度视力没有统计学差异(P_100%=1，P_25%=1，P_10%=0.86)； A组在各对比度下的视力高于B组(P_100%=0.010，P_25%=0.004，P_10%=0.041)，B组在100%，25%对比度下的对比度视力低于C组，差异有统计学意义，在降至10%对比度时，两者差异无统计学意义(P_100%=0.014，P_25%=0.016，P_10%=0.457)。暗视下A组和C组在100%、25%对比度下的对比度视力无明显差异，在10%对比度下的对比度视力A组高于C组，差异有统计学意义(P_100%=1，P_25%=0.111，P_10%=0.029)。A组在3种对比度下的视力均高于B组，差异有统计学意义(P_100%=0.000，P_25%=0.000，P_10%=0.001)。B组在100%，25%对比度下的对比度视力低于C组差异有统计学意义，在降至10%对比度时两者的对比度视力无统计学差异(P_100%=0.000，P_25%=0.039，P_10%=0.596)。

结论：在对于老年白内障患者光变色IOL在中高低对比度下比蓝光滤过IOL在暗视条件下具有更好的视觉质量。

METHODS: Totally 97 cases(102 eyes)were randomly divided into 3 groups according to the type of IOL. Group A were implanted photochromic IOL, group B were implanted blue-light filtering IOL, group C were implanted conventional clear IOL. The contrast vision was evaluated in photopic condition three months after operation.

RESULTS: In the scotopia condition, the contrast vision of the group A was lower than that in the photopic condition, but the contrast vision of the group A became statistically different until the contrast dropped to 10% contrast condition. The contrast vision of group B and group C were lower than that in the photopic condition and there had significant statistical difference. In the photopic condition: there was no significant statistical difference between group A and C in all the contrast level(P_100%=1, P_25%=1, P_10%=0.86); the contrast vision of the group A was higher than group B in all the contrast level(P_100%=0.010, P_25%=0.004, P_10%=0.041); In the 100%, 25% contrast condition, the contrast vision of the group B was lower than group C. Difference was statistically significant, but it became no statistically significant difference until the contrast dropped to 10% contrast condition(P_100%=0.014, P_25%=0.016, P_10%=0.457). In the scotopia condition: there was no statistical difference between group A and group C in 100%, 25% contrast level, but in the 10% contrast condition the contrast vision of the group A was higher than group C. Difference was statistically significant(P_100%=1, P_25%=0.111, P_10%=0.029). The contrast vision of the group A was higher than group B in all the contrast level. Difference was statistically significant(P_100%=0.000, P_25%=0.000, P_10%=0.001). The contrast vision of group B was lower than group C in the 100%, 25% contrast condition. Difference was statistically significant, but it became no statistically different until the contrast dropped to 10% contrast condition(P_100%=0.000, P_25%=0.039, P_10%=0.596).

CONCLUSION: To the senile cataract patients, the photochromic Matrix 400 has better visual quality in scotopia lighting condition than the blue-light filtering people.