视区切削直径大小对LASIK手术患者波前像差的影响

Effect of the size of ablation zone on the wavefront aberration in the LASIK patients

目的:研究视区切削直径大小对LASIK手术后患者波前像差的影响,以便指导临床LASIK手术方式的选择。方法:采用WFA1000型主观像差仪得到近视眼患者37例72眼。LASIK术前和术后1mo单光区手术组55眼(视区直径6.5mm),多光区手术组17眼(视区直径4.5～5.0mm)的波前像差变化数据;然后用Matlab软件分析其结果,并做统计分析。结果:视区切削直径大小与像差密切相关,直径越大,术后产生的像差越小。结论:多光区光滑技术由于较单区技术带来更多的像差,所以在手术时,建议首选单区方式。

AIM： To study the effect of the size of ablation zone on the wavefront aberrations in the LASIK operations. METHODS： Wavefront aberrations in 37 patients （72 eyes） were measured in small pupil （2-4mm） and dilated pupil （〉6.5mm） by using WAF1 000,a spatially resolved refractometer before and one month after the LASIK respectively. The results were analyzed with Matlab software and paired-sample t test and independent-samples t test were used for statistical analysis. RESULTS： The size of ablation zone had a close relation with the wavefront aberration. With the size of ablation zone increasing, the value of aberration declined. CONCLUSION： Multiwave pattern can induce more aberration than regular pattern does after LASIK surgeries, thus, regular pattern should be suggested as first option in the LA, SIK operations.