title: Intraindividual comparative study of corneal and ocular wavefront aberrations after biaxial microincision versus coaxial small-incision cataract surgery.
abstract: OBJECTIVE
  To compare the optical outcomes of biaxial microincision cataract surgery (B-MICS) versus coaxial small-incision cataract surgery (C-SICS).
  
  
  METHODS
  Thirty patients (sixty eyes) with bilateral age-related cataract underwent B-MICS through a 1.7 mm clear corneal incision (CCI) in one eye and C-SICS through a 2.8-mm CCI in the other eye. Every eye was implanted with a micro-incision aspheric aberration-free intraocular lens (Akreos MI60 AO). Preoperative corneal aberrations, and 3-month postoperative corneal and total ocular aberrations were calculated and compared.
  
  
  RESULTS
  The 3-month postoperative corneal root mean square (RMS) of third- to sixth-order aberrations (p<0.001), third-order trefoil (p = 0.001), trefoil-like (p<0.001), and third-order RMS (p<0.001) were lower in the B-MICS group than in the C-SICS group. Surgically induced corneal trefoil was reduced in B-MICS eyes (p = 0.001). The total ocular high-order RMS (p = 0.002), third-trefoil (p<0.001), trefoil-like (p<0.001) and fifth-order RMS (p<0.001) were lower in B-MICS than in C-SICS eyes. Corneal aberrations were positively correlated with ocular aberrations for the RMS of third- to sixth-order aberrations, third-trefoil and spherical-like aberrations. Visual acuity, refraction and corneal astigmatism were not different between both groups.
  
  
  CONCLUSIONS
  Compared with conventional surgery, B-MICS could improve the optical performances of the pseudophakic eye reducing surgically induced corneal higher-order aberrations.
authors.affiliation: Department of Ophthalmology, University Hospital of Bretonneau, 2 Boulevard Tonnellé, 37000 Tours, France.
authors.forename: A
authors.initials: A
authors.lastname: Denoyer
authors.forename: L
authors.initials: L
authors.lastname: Denoyer
authors.forename: D
authors.initials: D
authors.lastname: Marotte
authors.forename: M
authors.initials: M
authors.lastname: Georget
authors.forename: P-J
authors.initials: PJ
authors.lastname: Pisella