Clinical comparison and obrvation of the value of RMSh and MTF after implantation of blue- light-blocking aspherical intraocular lens

Objective To observe the value of RMSh and MTF 3 months after implantation of bluelight-blocking aspherical intraocular lens. Methods Patients were divided into three groups according to their selection among three kinds of implant IOL： GroupⅠ（PY-60AD）, Group Ⅱ （Acrysof IQ）,and Group Ⅲ （YA-60BB）, Wavefront aberrations were measured across different pupil diameters （PD）（3mm,4mm,5mm,6mm） to record the values of the Z40, coma,total higher order aberration and modulation transfer function （MTF） under pupil diameters of 3mm,5mm three months after cataract phacoemusification and implantation of IOL. Results The values of Z40 in the two aspherical IOL groups were significantly lower than the spherical IOL group at all different pupil diameters （P〈0.05）.There was no significant difference between two aspherical IOL groups about the value of Z40.There were no statistically significant differences about the values of coma among three groups （P 〉0.05）. The values of RMSh in the two aspherical IOL groups were significantly lower than the spherical IOL group （P〈0.05） when the PD≥5mm, but had no significant difference when the PD〈5mm（P〉0.05）.There was no significant difference between two aspherical IOL groups about the RMSh at all different pupil diameters （P〉0.1）. At a 3mm pupil diameter,there were no statistically significant differences about the values of MTF at all spatial frequency （5,10,15,20,25,30cpd） among three groups （P〉0.05）.At a 5mm pupil diameter,the values of MTF in the two aspherical IOL groups were significantly lower than the spherical IOL group at spatial of 5,10,15,20,25cpd （P〈0.05）. There was no significant difference between two aspherical IOL groups about the values of MTF, but in the following order group Acrysof IQ〉group PY-60AD （P〉0.05）. Conclusions PY-60AD and Acrysof IQ IOL can decrease the spherical aberration even when the pupil diameter at only 3mm and decrease the higher order aberration when the pupil diameter at or greater than 5mm. Thereby the patients who implanted with aspherical IOLs can acquire better visual quality.There is no significant difference when PY-60AD comparing to Acrysof IQ about the values of wavefront aberrations and MTF. And HOYA PY-60AD is a preloaded IOL that have many advantages fit for widely applied in clinical field. Key words: Cataract phacoemulsification;  Aspharical intraocular lens;  Wavefront aberrations;  Pupildiameter;  Modulation transfer function