摘要
目的应用超声生物显微镜(UBM)观察高度近视患者植入有晶状体眼6H2型前房型人工晶状体(PAC-IOL)的位置及与邻近结构的解剖关系。方法15例(29眼)高度近视患者植入PAC-IOL。术前应用UBM测量前房深度,术后3个月,观察IOL襻的位置,测量中央及周边6点、12点处IOL与角膜内皮的距离,IOL与晶状体的距离,IOL边缘与虹膜的距离。结果术前前房深度为3.11～3.52mm。术后3个月,IOL襻均位于前房角,中央及周边6点、12点处IOL与角膜内皮的距离分别为(2.341±0.116)、(1.601±0.025)、(1.601±0.028)mm;IOL中央与晶状体的距离为(0.841±0.140)mm;IOL边缘与虹膜的距离为(0.346±0.046)mm。结论Phakic6H2PAC-IOL与角膜内皮和晶状体保持有效的安全距离。其弹性支撑襻均位于前房角。IOL襻向后作用于虹膜和前房角,有可能导致临床上发生瞳孔变形。
Objective The influence of implantation of phakic anterior chamber intraocular lens （PAC-IOL） on the structure of ocular anterior segment in Chinese is unclear now. This work was to evaluate the efficacy and safety of the implantation of PAC-IOL for the correction of severe myopia by studying the intraocular location and anatomy of intraocular lens （IOL） using ultrasound biomicroscopy（UBM）. Methods Fifteen cases （29 phakic myopic eyes）corrected by Phakic 6H2 angle-supported PAC-IOL were examined by UBM. The preoperative anterior chamber depth （ACD） , the position of IOL footplates and the distances between the corneal endothelium and IOL at the central and peripheral cornea, between IOL and lens,distance between IOL and iris were measured at 3 months postoperatively. Results The preoperative ACD ranged from 3.01 to 3.50 mm. The mean distance between the central cornea and the IOL,IOL and lens,edge of the IOL optic and the endothelium,edge of the IOL optic and the iris was 2. 341 ± 0. 116 mm, 0. 841 ± 0. 140 ram, 1. 601 ± 0. 025 mm, 1. 601 ± 0. 028 mm and 0. 346 ± 0. 046 mm, respectively. The IOL footplates appeared to be correctly positioned in the anterior chamber angle in all eyes. Postoperative uncorrected visual acuity achived 0.5 or better and best corrected visual acuity 0.8 or better,showing a significant increase than that of preoperation（χ^2 = 38. 11,5.24 ,P 〈 0. 05 ）. The mean postoperative spherical equivalent refraction was significantly lower than preoperative value（ t = 32. 8, P 〈 0. 05 ）. There were no statistically significant difference in mean intraocular pressure, corneal endothelial density between preoperation and 3 months in postoperation, respectively （ t = 0.97, P 〉 0.05 ; t = 0.47, P 〉 0.05）. Conclusion The space between the IOL and endothelium or lens in eyes with the phakic 6H2 angle-supported phakic IOL is as safe and enough big as in eyes with other angle-supported phakic IOLs. That the IOL footplates pressure the iris and the anterior chamber angle plays a minor role in the mechanism of pupil deformation with this lens model.
出处
《眼科研究》
CSCD
北大核心
2007年第12期968-971,共4页
Chinese Ophthalmic Research
