Background: To evaluate the effects of anterior capsular opening size on deviation from predicted refraction and\nthe effective position of the intraocular lens (ELP) in cataract surgery.\nMethods: Nonrandomized clinical trial. Eighty patients (80 eyes) with simple age-related cataracts were treated\nfrom May 2018 to September 2018 at the Fourth Affiliated Hospital of China Medical University. All patients\nundergoing phacoemulsification received intraocular lens based on the voluntary principle. Forty eyes were\nimplanted with the C-loop haptic intraocular lens (AMO Tecnis ZCB00) while the other 40 eyes were implanted\nwith the plate haptic intraocular lens (CT ASPHINA 509 M). Follow-up visits were conducted postoperatively at 1\nweek, 1 month, and 3 months during which patients underwent refraction and data collection after pupil dilation,\nwhich included anterior segment photography and Scheimpflug imaging by Pentacam. The area, horizontal and\nvertical diameter of the capsulorrhexis, circularity, decentration, and package were analysed using the image\nanalysis software Image-Pro-Plus 6.0,then evaluated the relationship between the different shapes of capsulorrhexis\nwith deviation from predicted refraction and ELP in cataract surgery.\nResults: Deviation from predicted refraction and all of the parameters of capsulorrhexis were not correlative in the\n509M IOL group, however, in the Tecnis IOL group, while the deviation from predicted refraction and all of the\ncapsulorrhexis parameters were not correlative at 1 week, the deviation from predicted refraction did correlate with\ncapsulorrhexis area, horizontal diameter at 1 month (P = 0.029, P = 0.048), and with capsulorrhexis area, vertical diameter\nat 3months (P = 0.03, P = 0.017). The ELP correlated with package in both groups postoperatively (r > 0, P < 0.05), but\nthere is no other capsulorrhexis parameters correlated with ELP in the 509M IOL group (all P > 0.05). For the Tecnis IOL\ngroup, the ELP and capsulorrhexis area were correlated at 1 week and 1 month, while the ELP and horizontal diameter,\nthe ELP and vertical diameter were correlated at 1 week, but did not correlate with the other capsulorrhexis parameters\nin the Tecnis IOL group (all P > 0.05).\nConclusions: The shape of the capsulorrhexis has an effect on postoperative refractive outcomes and the effective\nposition of the intraocular lens in cataract surgery, and plate haptic intraocular lenses have better refractive stability\nthan C-loop haptic intraocular lenses.
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