title: Corneal Astigmatism and Aberrations After Combined Femtosecond-Assisted Phacoemulsification and Arcuate Keratotomy: Two-Year Results.
abstract: OBJECTIVE
  To investigate the stability of corneal astigmatism and higher-order aberrations after combined femtosecond-assisted phacoemulsification and arcuate keratotomy.
  
  
  METHODS
  Retrospective, interventional case series.
  
  
  METHODS
  Surgery was performed using a VICTUS (Bausch & Lomb Inc, Dornach, Germany) platform. A single, 450-μm deep, arcuate keratotomy was paired at the 8-mm zone with the main phacoemulsification incision in the opposite meridian. The keratotomy incisions were not opened. Corneal astigmatism and higher-order aberration measurements obtained preoperatively and at 2 months and 2 years postoperatively were analyzed.
  
  
  RESULTS
  Fifty eyes of 50 patients (mean age 66.2 ± 10.5 years) were included. The mean preoperative corneal astigmatism was 1.35 ± 0.48 diopters (D). This was reduced to 0.67 ± 0.54 D at 2 months and 0.74 ± 0.53 D at 2 years postoperatively (P < .001). There was no statistically significant difference between postoperative corneal astigmatism over 2 years (P = .392). Both magnitude of error and absolute angle of error were comparable between the 2 postoperative time points (P > .283). At postoperative 2 months and 2 years, 72% and 70% of eyes were within 15 degrees of preoperative meridian of astigmatism, respectively. All wavefront measurements increased significantly at 2 months and 2 years (P < .007), except spherical aberration (P > .150). There was no significant difference in higher-order aberrations between 2 months and 2 years postoperatively (P > .486).
  
  
  CONCLUSIONS
  Our study showed the stability of femtosecond-assisted arcuate keratotomy. Further studies using other platforms and nomograms are needed to corroborate the findings of this study.
authors: Hong Kong Eye Hospital, Kowloon, Hong Kong; Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong.
authors: Tommy C Y
authors: TC
authors: Chan
authors: Department of Ophthalmology, The University of Hong Kong, Hong Kong.
authors: Alex L K
authors: AL
authors: Ng
authors: Hong Kong Laser Eye Centre, Hong Kong.
authors: George P M
authors: GP
authors: Cheng
authors: Guangzhou Aier Eye Hospital, Guangzhou, China.
authors: Zheng
authors: Z
authors: Wang
authors: Hong Kong Laser Eye Centre, Hong Kong.
authors: Victor C P
authors: VC
authors: Woo
authors: Hong Kong Eye Hospital, Kowloon, Hong Kong; Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong; Centre for Eye Research Australia, University of Melbourne, Melbourne, Australia. Electronic address: vishaljhanji@gmail.com.
authors: Vishal
authors: V
authors: Jhanji
mesh_terms: D000368:Aged; D001251:Astigmatism / Q000503:physiopathology*; D002386:Cataract / Q000150:complications / Q000503:physiopathology; D003315:Cornea / Q000503:physiopathology*; D003316:Corneal Diseases / Q000150:complications / Q000503:physiopathology; D019781:Corneal Topography; D057108:Corneal Wavefront Aberration / Q000503:physiopathology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007646:Keratotomy, Radial; D053685:Laser Therapy; D008297:Male; D008875:Middle Aged; D049451:Nomograms; D018918:Phacoemulsification; D011183:Postoperative Complications; D012189:Retrospective Studies; D014792:Visual Acuity / Q000502:physiology