有的患者在白内障发展成熟或接近成熟时才就诊或寻求手术治疗,因此时已失去了直接观察眼底状况的机会,为术后视力评估带来了困难,尤其在病史不详的情况下,有些玻璃体病变、视网膜脱离等致盲疾病可能被白内障掩盖,致使手术医生不能全面、详细地了解病情,做出正确的选择。近年来, Some patients only seek medical attention or seek surgical treatment when the cataract is mature or near maturity. Therefore, the opportunity to directly observe the status of the fundus has been lost, which poses difficulties for postoperative visual acuity assessment. Especially in the case of unknown history, some vitreous Blindness such as lesions and retinal detachment may be covered by cataracts, so that the surgeon can not fully understand the condition and make the correct choice. In recent years,