掺钕钇铝石榴石激光后囊膜混浊切开对人工晶状体眼波前像差的影响

目的研究掺钕钇铝石榴石(Nd:YAG)激光后囊膜混浊切开对人工晶状体(IOL)眼波前像差的影响。方法对57例(68眼)白内障超声乳化吸除加IOL植入术后后囊膜混浊(PCO)患者行Nd:YAG激光后囊膜切开,激光前后应用NidekOPDScanⅠ角膜地形图/波前像差仪测量瞳孔直径为5.0mm时IOL眼的总像差、总高阶像差、球差、彗差和三叶草像差的均方根值(RMS),比较Nd:YAG激光前后波前像差的变化。Nd:YAG激光后囊膜切开采用环形切开向后翻转法,切开后囊膜瓣直径为5.0mm。结果激光术后最佳矫正视力较术前提高,差异有统计学意义(P<0.05)。激光术后总像差、总高阶像差、球差、彗差和三叶草像差的RMS分别为1.849±0.763、0.605±0.247、0.238±0.146、0.166±0.112及0.322±0.132,均较术前下降,差异有统计学意义(P<0.05)。结论 Nd:YAG激光后囊膜混浊切开直径5.0mm可以明显降低IOL眼的波前像差,改善视觉质量。

Effect of neodymium yttrium aluminum garnet laser capsulotomy on ocular wavefront aberrations in pseudophakic eyes with posterior capsule opacification

Objective To evaluate the effect of neodymium： YAG （ Nd： YAG） laser capsulotomy on ocular wavefront aberrations in pseudophakic eyes with posterior capsule opacifieation （PCO）. Methods The wavefront aberrations in 68 pseudophakic eyes of 57 patients with PCO were measured with Nidek OPD aberrometer/ topographer before and after Nd ：YAG laser capsulotomy. Root-mean-square （RMS） of total aberration, higher aberration, spherical aberration, coma and trefoil at 5.0 mm pupil diameter was measured. Results Best corrected visual acuity improved in all eyes after Nd ：YAG capsulotomy significantly （ P 〈 0.05 ）. The RMS of total aberration, higher aberration, spherical aberration, coma and trefoil was 1. 849 ± 0. 763, 0.605± 0.247, 0. 238 ± 0. 146, 0. 166 ± 0.112 and 0. 322 ± 0. 132, respectively after capsulotomy. The RMS values in all eyes decreased after capsulotomy significantly （ P 〈 0.05 ）. Conclusions Nd：YAG laser capsulotomy significantly reduced the wavefront RMS in the pseudophakic eyes with PCO.