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对老年性白内障患者术前行光感距离和定位测定及色觉等视功能检查是重要的常规,一般只对视功能正常者(即5m 有光感、1m 光定位正常、色觉较好)始予手
Preoperative senile cataract light perception distance and positioning determination and color vision and other visual function tests is an important routine, usually only normal function (ie 5m light perception, 1m light positioning is normal, good color vision) was given hand