这种检查的一个问题是放在患者面前的镜片仅由两种类型组成：球形和圆柱形。在开眼镜时，这是足够的，因为眼镜只能具有相同的两种形状并且可以矫正视力。除了球面和圆柱误差外，我们的视觉还有许多像差。我们有被称为畸变“高阶像差”, which include coma, trefoil, spherical aberration, and others. Glasses cannot correct for these aberrations. With a laser vision correction, such as LASIK, the correction of 高阶像差 are a possibility. For many people, these 高阶像差 are very minor. There are some people who wavefront LASIK provides vision that is superior to standard LASIK 要么 a glasses correction. Wavefront LASIK has been shown to reduce the possibility of glare 要么 halos which can occur following LASIK surgery.