临床资料本组171例(192眼)均系老年性白内障,无全身和眼部手术禁忌症,眼压指测均正常。白内障冷冻摘除按常规术式,非计划性囊外手术未列入本文。术前除应用适量镇静药物外,所有患者均未用任何降眼压药物。手术时先用含少量1‰肾上腺素的2％普鲁卡因溶液做眼睑阻滞和上方球结膜下浸润麻醉。根据 Clinical data 171 cases (192 eyes) of this group are senile cataracts, no contraindications to systemic and ocular surgery, intraocular pressure refers to the measured normal. Cataract cryoablation according to conventional procedures, unplanned extracapsular surgery is not included in this article. In addition to the appropriate amount of sedation before surgery, all patients did not use any antihypertensive drugs. Surgery first with a small amount of 1 ‰ epinephrine 2% procaine solution to do eyelid blockade and supratentorial subconjunctival anesthesia. according to