Journal of Otolaryngology and Ophthalmology of Shandong University ›› 2019, Vol. 33 ›› Issue (4): 109-114.doi: 10.6040/j.issn.1673-3770.0.2018.357

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Visual quality research on a custom selection of aspheric intraocular lenses in cataract patients

LIN Jia, LIAO Xuan, LAN Changjun, TAN Qingqing, WEN Baiwei, TIAN Jing   

  1. Department of Ophthalmology, Affiliated Hospital of North Sichuan Medical College, Department of Ophthalmology & Optometry of North Sichuan Medical College, Nanchong 637000, Sichuan, China
  • Online:2019-07-20 Published:2019-07-22

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Abstract: ObjectiveTo compare the visual quality after implanting aspheric and spherical intraocular lenses(IOLs)in cataract patients, to influence selectability of the better lens. Methods A prospective, non-random, controlled study was conducted on 59 age-related cataract patients(91 eyes)after phacoemulsification and IOL implantation. They were sorted into two groups; group A received aspheric IOLs and group B received spherical IOLs. Corneal, internal, and ocular high order aberrations(HOAs)including spherical aberration(SA), coma and trefoil, and total high order aberration(tHOA), were measured at 3 months postoperatively at pupil diameters(PD)of 4 mm and 6 mm using Topcon KR-1W. Objective scatter index(OSI), strehl ratio(SR), modulation transfer function(MTF)cut off, contrast visual acuity OV100%, OV20%, and OV9% were measured by OQASTMⅡ and the CSV-1 000. The independent samples t-test was used to analyze the data. Results There were no statistically significant differences between group A and B in uncorrected visual acuity and best corrected visual acuity. There was no statistically significant difference between the two groups in corneal tHOA, SA, coma, and trefoil at 4 mm and 6 mm PD. There was a statistically significant difference between the two groups in internal SA, but no significant difference in internal tHOA, coma, or trefoil at 4 mm and 6 mm PD. There was a statistically significant difference between the two groups in ocular SA but no significant difference in coma and trefoil at 4 mm PD. There was a statistically significant difference between the two groups in ocular tHOA, SA, but no significant difference in ocular tHOA, coma, and trefoil at 6 mm PD. There was a statistically significant difference between the two groups in OSI, MTF cut off, SR, OV100%, OV20%, and OV9%. With respect to CS, no significant difference was found at a spatial frequency of 3 cpd, but significant differences at 6 cpd, 12 cpd, and 18 cpd were observed between aspheric and spherical IOL groups. Conclusion The ocular tHOA, SA and internal SA in aspheric IOL group were lower than the spherical group at 4 mm and 6 mm PD; which demontrates that the visual quality parameters from the Optical Quality Analysis System and the middle and high frequency(6 cpd, 12 cpd, 18 cpd)in the aspheric IOL group were better than those of the spherical IOL group. Visual quality in aspheric IOL groups was better than spherical IOL groups.

Key words: Cataract, Spherical intraocular lenses, Aspheric intraocular lenses

CLC Number: 

  • R776
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