title: Comparative analysis of the visual performance and aberrometric outcomes with a new hybrid and two silicone hydrogel multifocal contact lenses: a pilot study.
abstract: BACKGROUND
  The aim was to evaluate the visual performance achieved with a new multifocal hybrid contact lens and to compare it with that obtained with two other currently available multifocal soft contact lenses.
  
  
  METHODS
  This pilot prospective comparative study comprised a total of 16 presbyopic eyes of eight patients ranging in age from 43 to 58 years. All patients were fitted with three different models of multifocal contact lens: Duette multifocal (SynergEyes), Air Optix AQUA multifocal (Alcon) and Biofinity multifocal (CooperVision). Fittings were performed randomly in each patient according to a random number sequence, with a wash-out period between fittings of seven days. At two weeks post-fitting, visual, photopic contrast sensitivity and ocular aberrometry were evaluated.
  
  
  RESULTS
  No statistically significant differences were found in distance and near visual acuity achieved with the three different types of multifocal contact lens (p ≥ 0.05). Likewise, no significant differences between lenses were found in the monocular and binocular defocus curve (p ≥ 0.10). Concerning contrast sensitivity, better monocular contrast sensitivities for 6, 12 and 18 cycles per degree were found with the Duette and Air Optix multifocal compared to Biofinity (p = 0.02). Binocularly, differences between lenses were not significant (p ≥ 0.27). Furthermore, trefoil aberration was significantly higher with Biofinity multifocal (p < 0.01) and Air Optix (p = 0.01) multifocal compared to Duette.
  
  
  CONCLUSIONS
  The Duette multifocal hybrid contact lens seems to provide similar visual quality outcomes in presbyopic patients with low corneal astigmatism, when compared with other soft multifocal contact lenses. This preliminary result should be confirmed in studies with larger samples.
authors.affiliation: Department of Ophthalmology (Oftalmar), Medimar International Hospital, Alicante, Spain.|Fundación para la Calidad Visual, Alicante, Spain.|Department of Optics, Pharmacology and Anatomy, University of Alicante, Spain.
authors.forename: David P
authors.initials: DP
authors.lastname: Piñero
authors.affiliation: Department of Optics II (Optometry and Vision), Complutense University of Madrid, Spain.
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Carracedo
authors.affiliation: Department of Ophthalmology (Oftalmar), Medimar International Hospital, Alicante, Spain.|Fundación para la Calidad Visual, Alicante, Spain.
authors.forename: Pedro
authors.initials: P
authors.lastname: Ruiz-Fortes
authors.affiliation: Department of Ophthalmology (Oftalmar), Medimar International Hospital, Alicante, Spain.|Fundación para la Calidad Visual, Alicante, Spain.
authors.forename: Rafael J
authors.initials: RJ
authors.lastname: Pérez-Cambrodí
mesh_terms: D057128:Aberrometry / Q000379:methods*; D000328:Adult; D003263:Contact Lenses, Hydrophilic; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011305:Presbyopia / Q000503:physiopathology* / Q000534:rehabilitation; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology*; D015348:Vision, Binocular / Q000502:physiology*
keywords: aberrations; contact lenses; contrast sensitivity; presbyopia