WaveScan波前像差仪验光与检影验光的比较研究

The comparison between the WaveScan wavefront aberrometer and the retinoscopy refraction

目的评价WaveScan波前像差仪测量低阶像差的准确性。方法随机抽取2008-04～10来我院行LASIK手术的近视眼患者91例,按年龄分A,B两组,A组行波前像差仪和散瞳检影检查,B组行波前像差仪和小瞳检影检查,将所得结果的球镜、柱镜、柱镜轴向分别进行统计学分析。结果 A组WaveScan波前像差仪检测的球镜、柱镜及其轴向与散瞳检影的结果比较差异均有统计学意义(P<0.05),B组WaveScan波前像差仪验光结果与小瞳检影结果在球镜、柱镜及其轴向差异均有统计学意义(P<0.05);小瞳检影结果的均值比散瞳检影结果的均值更接近于像差仪检测结果均值,并且小瞳检影比散瞳检影与波前像差仪的低阶像差具有更好的一致性;男性的右眼瞳孔直径大于左眼直径,女性也是类似的结果。结论应用WaveScan波前像差仪在暗室原瞳状态下测量眼的低阶像差与客观检影验光结果存在差异,此差异可能与存在调节和不同验光方法的精确性不同有关,提示运用波前像差仪检测低阶像差仍需克服调节、瞳孔直径个体差异和患者配合程度等混杂因素的影响。

Objective To investigate the accuracy of Wavescan wavefront aberrometer in measuring the lower order aberrations. Methods Ninety - one myopia patients were selected randomly from the LASIK patients in our hospital from April to October,2008. The patients were divided into two groups according to the age： refractive status were measured by wavefront aberrometer and cycloplegic retinoscopy refraction in group A, while the wavefront aberrometer and noncycloplegic retinoscopy refraction were employed in group B, the sphere, cylinder and cylindrical axis were analyzed. Results The sphere, cylinder and cylindrical axis measured by the aberremeter and the cycloplegic pupil had significant difference （P 〈 0.05） in group A. The sphere, cylinder and cylindrical axis measured by the aberrometer and the noncycloplegic pupil also have significant difference （ P 〈 0.05 ） in group B. However, the refractive error measured by noncycloplegic retinoscopy refraction was more closed to the sphero - cylinder result of the wavefront analyzer than those measured by cycloplegic retinoscopy optometry. The consistence of low - order aberration between the wavefront analyzer and non - cycloplegic retinoscopy optometry was better than those between the wavefront analyzer and cycloplegic retinoscopy optometry. The pupil diameter of the right eye was larger than the left eye＇ s in the male; the similar result were observed in the female. Conclusion The difference of the refractive value between the wavescan abrrometer and objective retinoscopy refraction was observed, which was likely attributed to the accommodation or the different precision of the optometry method, that means we need to take compounding factors such as accommodation, pupil diameter and compliance of patients into account when the refractive error be measured by wavefront analyzer.