目的：白内障手术亦被归为一种屈光手术，但鲜有针对患者手术前后眼球生物测定值的改变研究。文中通过白内障超声乳化加人工晶状体植入手术对前后A超眼球生物测定值的动态对比观察，统计分析其临床意义。方法连续动态观察南京军区南京总医院眼科2011年1月至2013年1月间行固定白内障手术188眼，采用A超分别对术前、术后14 d患者眼球生物值进行测定，包括前房深度、玻璃体腔深度、眼轴长度，并对手术前后患者坐、卧位的眼球生物值进行对比观测，另测量患者手术前后裸眼视力及眼压变化，对各项生物测定值进行统计学分析。结果手术前后视力[（0．17±0．19） vs （0．61±0．27）]及眼压[（15．09±8．50）mmHg vs （12．99±4．44）mmHg]变化差异均有统计学意义（P＜0．05）。手术前后前房深度改变差异有统计学意义（P＜0．05），手术前后坐位与卧位前房深度差异无统计学意义（P＞0．05）。手术前后玻璃体腔深度差异有统计学意义（P＜0．05），术前坐、卧位玻璃体腔深度差异无统计学意义[（16．568±2．406）mm vs （16．524±5．544） mm，P＞0．05]，术后坐、卧位玻璃体腔深度差异有统计学意义（P＜0．05）。手术前后眼轴长度差异无统计学意义（P＞0．05）。结论白内障超声乳化加人工晶状体植入手术效果良好，患者的体位对A超测定无影响。%Objective Cataract surgery is also considered as a type of refractive surgery , but there is few research on the change of preoperative and postoperative ocular biometry measurements .The aim of the study was to compare the A-scan ultrasound biom-etry measurements before and after phacoemulsification with intraocular lens implantation , followed by the analysis on its clinical signifi-cance . Methods Dynamic observation was conducted in 188 eyes of 155 cataract patients who received cataract operation from January 2011 to January 2013 in the department of ophthalmology in Nanjing Gernal Hospital .Measurements were made before surgery and 14 days after surgery by Ultrascan Digital 2000 contact ultraound A-scan (Alcon), including anterior chamber depth (ACD), vitreous cham-ber depth ( V) and axial length ( AL) .Simultaneously , a prospective comparison of measurements was made by A-scan ultrasound in sit-ting and decubitus position .Measurements were also conducted in preoperative and postoperative visual acuity and intraocular pressure of the patients. Results visual acuity and intraocular pressure: The difference between preoperative and postoperative visual acuity [(0.17 ±0.19) vs (0.61 ±0.27)] and intraocular pressure [(15.09 ±8.50) mmHg vs (12.99 ±4.44) mmHg] was of statistical sig-nificance ( P<0.05) .ACD:The difference between peroperative and postoperative ACDs measured by A-scan ultrasound was of statisti-cal significance (P<0.05).No significant difference existed between ACDs in sitting and decubitus positions before and after the opera -tion (P>0.05).V:The difference between peroperative and postoperative Vs was of significant difference (P<0.05).No significant difference existed between Vs in sitting and decubitus position before the operation [(16.568 ±2.406) mm vs (16.524 ±5.544) mm,with intraocular lens implantation can get better operation result. In addition, different measuring positions have no influence on A-scan ultrasound measurements except the postoperative vitreous cavity depth .
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