title: Optical quality of toric intraocular lens implantation in cataract surgery.
abstract: OBJECTIVE
  To analyze the optical quality after implantation of toric intraocular lens with optical quality analysis system.
  
  
  METHODS
  Fifty-two eyes of forty-four patients with regular corneal astigmatism of at least 1.00 D underwent implantation of AcrySof toric intraocular lens, including T3 group 19 eyes, T4 group 18 eyes, T5 group 10 eyes, T6 group 5 eyes. Main outcomes evaluated at 3mo of follow-up, included uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), residual refractive cylinder and intraocular lens (IOL) axis rotation. Objective optical quality were measured using optical quality analysis system (OQAS II(®), Visiometrics, Spain), included the cutoff frequency of modulation transfer function (MTFcutoff), objective scattering index (OSI), Strehl ratio, optical quality analysis system value (OV) 100%, OV 20% and OV 9% [the optical quality analysis system (OQAS) values at contrasts of 100%, 20%, and 9%].
  
  
  RESULTS
  At 3mo postoperative, the mean UDVA and CDVA was 0.18±0.11 and 0.07±0.08 logMAR; the mean residual refractive cylinder was 0.50±0.29 D; the mean toric IOL axis rotation was 3.62±1.76 degrees, the mean MTFcutoff, OSI, Strehl ratio, OV 100%, OV 20% and OV 9% were 22.862±5.584, 1.80±0.84, 0.155±0.038, 0.76±0.18, 0.77±0.19 and 0.78±0.21. The values of UDVA, CDVA, IOL axis rotation, MTFcutoff, OSI, Strehl ratio, OV100%, OV20% and OV9% depending on the power of the cylinder of the implantation were not significantly different (P>0.05), except the residual refractive cylinder (P<0.05).
  
  
  CONCLUSIONS
  The optical quality analysis system was useful for characterizing the optical quality of AcrySof toric IOL implantation. Implantation of an AcrySof toric IOL is an effective and safe method to correct corneal astigmatism during cataract surgery.
authors.affiliation: Tianjin Medical University Eye Hospital, Tianjin 300384, China ; Xiamen Eye Center of Xiamen University, Xiamen 361000, Fujian Province, China.
authors.forename: Xian-Wen
authors.initials: XW
authors.lastname: Xiao
authors.affiliation: Tianjin Medical University Eye Hospital, Tianjin 300384, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Hao
authors.affiliation: Tianjin Medical University Eye Hospital, Tianjin 300384, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Tianjin Medical University Eye Hospital, Tianjin 300384, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Tian
keywords: astigmatism; optical quality analysis system; toric intraocular lens