title: [Visual performance in myopic correction with spectacles and soft contact lenses].
abstract: OBJECTIVE
  To evaluate the visual performance by high contrast visual acuity, contrast sensitivity and wavefront in myopic patients with or without astigmatism corrected with spectacles and with three different soft contact lenses [Acuvue 2 (Vistacon J&J Vision Care Inc., USA), Biomedics 55 (Ocular Science, USA), and Focus 1-2 week (Ciba Vision Corporation, USA)].
  
  
  METHODS
  An interventional prospective clinical trial studied a sample of 40 myopic patients (-1.00 to -4.50 sph, with or without astigmatism up to -0.75 cyl). Each patient had one eye randomized to visual performance evaluation.
  
  
  RESULTS
  The Zywave aberrometer detected a over refraction and significant difference between Acuvue 2 and Biomedics 55 regarding spheric refractive components and spheric equivalent. Both soft contact lenses showed hypercorrection as compared to Focus 1-2 week. Visual performance was not significantly different with spectacles and the three soft contact lenses in visual acuity and contrast sensitivity measurements. The wavefront analysis detected a significant difference in a third order aberration with and without soft contact lenses, with better visual performance with Acuvue 2 and Biomedics 55.
  
  
  CONCLUSIONS
  In visual performance evaluation with spectacles and soft contact lenses the wavefront analysis was a more sensible measurement of visual function when compared to high contrast visual acuity and contrast sensitivity. The evaluation model of visual performance with wavefront analysis developed in this investigation may be useful for further similar studies.
authors.affiliation: Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil. brenobarth@digizap.com.br
authors.forename: Breno
authors.initials: B
authors.lastname: Barth
authors.forename: Mílton Ruiz
authors.initials: MR
authors.lastname: Alves
authors.forename: Newton
authors.initials: N
authors.lastname: Kara-José
mesh_terms: D000328:Adult; D003263:Contact Lenses, Hydrophilic; D015350:Contrast Sensitivity / Q000502:physiology*; D005139:Eyeglasses; D005260:Female; D006801:Humans; D008297:Male; D009216:Myopia / Q000534:rehabilitation*; D011446:Prospective Studies