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Intraindividual comparative study of corneal and ocular wavefront aberrations after biaxial microincision versus coaxial small-incision cataract surgery.
  1. Alexandre Denoyer (alexandre.denoyer{at},
  2. Ludovic Denoyer,
  3. David Marotte,
  4. Marine Georget,
  5. Pierre-Jean Pisella (pj.pisella{at}
  1. University Hospital of Tours, France
  2. LIP6, University pierre et Marie Curie, Paris, France
  3. University Hospital of Tours, France
  4. University Hospital of Tours, France
  5. University Hospital of Tours, France


    Aim: 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 IOL (Akreos MI60 AO, Bausch and Lomb, USA). Preoperative corneal aberrations, and 3-month postoperative corneal and total ocular aberrations were calculated and compared.

    Results: 3-month postoperative corneal root mean square (RMS) of 3rd- to 6th-order aberrations (p<0.001), 3rd-order trefoil (p=0.001), trefoil-like (p<0.001), and 3rd order RMS (p<0.001) were lower in B-MICS group than in C-SICS group. Surgically-induced corneal trefoil was reduced in B-MICS eyes (p=0.001). Total ocular high-order RMS (p=0.002), 3rd-trefoil (p<0.001), trefoil-like (p<0.001) and 5th-order RMS (p<0.001) were lower in B-MICS than in C-SICS eyes. Corneal aberrations were positively correlated with ocular ones for RMS of 3rd- to 6th-order aberrations, 3rd-trefoil and spherical-like aberrations. Visual acuity, refraction and corneal astigmatism were not different between both groups.

    Conclusion: Compared to conventional surgery, B-MICS could improve optical performances of the pseudophakic eye reducing surgically-induced corneal higher-order aberrations. (195 words)

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