title: Corneal changes with accommodation using dual Scheimpflug photography.
abstract: OBJECTIVE
  To assess whether corneal parameters and aberrations are affected by accommodation.
  
  
  METHODS
  Optics Department, University of Valencia, Valencia, Spain.
  
  
  METHODS
  Prospective cross-sectional study.
  
  
  METHODS
  The Galilei G4 dual Scheimpflug device was used to obtain data on the anterior and posterior axial curvatures, total corneal power (TCP), and corneal pachymetry from 3 corneal zones (central: 0.0 up to 4.0 mm; paracentral or mid: 4.0 up to 7.0 mm; peripheral: 7.0 up to 10.0 mm) in young emmetropic eyes in the unaccommodated and 4 accommodated states (from -1.0 to -4.0 diopters [D] in 1.0 D steps). The 2nd-, 3rd-, and 4th-order aberrations as well as the root mean square (RMS) were also determined for the entire cornea at the same accommodative demands.
  
  
  RESULTS
  The study evaluated 7 subjects (12 eyes). No significant changes in any measured parameter were found during accommodation for any corneal zone (P > .05). Statistically significant differences were found in the various corneal zones when it was assumed they were constant with accommodation (P < .01). A stable linear trend with accommodation was also found for corneal aberrations, although individual variations existed because of the high standard deviation values.
  
  
  CONCLUSIONS
  Different parameters in various zones of the cornea as well as corneal aberrations were stable during accommodation.
authors.affiliation: From the Faculty of Life Sciences (Sisó-Fuertes), University of Manchester, Manchester, United Kingdom; the Optometry Research Group, Optics Department (Domínguez-Vicent, del Águila-Carrasco, Ferrer-Blasco, Montés-Micó), University of Valencia, Valencia, Spain. Electronic address: irene.sisofuertes@manchester.ac.uk.
authors.forename: Irene
authors.initials: I
authors.lastname: Sisó-Fuertes
authors.affiliation: From the Faculty of Life Sciences (Sisó-Fuertes), University of Manchester, Manchester, United Kingdom; the Optometry Research Group, Optics Department (Domínguez-Vicent, del Águila-Carrasco, Ferrer-Blasco, Montés-Micó), University of Valencia, Valencia, Spain.
authors.forename: Alberto
authors.initials: A
authors.lastname: Domínguez-Vicent
authors.affiliation: From the Faculty of Life Sciences (Sisó-Fuertes), University of Manchester, Manchester, United Kingdom; the Optometry Research Group, Optics Department (Domínguez-Vicent, del Águila-Carrasco, Ferrer-Blasco, Montés-Micó), University of Valencia, Valencia, Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: del Águila-Carrasco
authors.affiliation: From the Faculty of Life Sciences (Sisó-Fuertes), University of Manchester, Manchester, United Kingdom; the Optometry Research Group, Optics Department (Domínguez-Vicent, del Águila-Carrasco, Ferrer-Blasco, Montés-Micó), University of Valencia, Valencia, Spain.
authors.forename: Teresa
authors.initials: T
authors.lastname: Ferrer-Blasco
authors.affiliation: From the Faculty of Life Sciences (Sisó-Fuertes), University of Manchester, Manchester, United Kingdom; the Optometry Research Group, Optics Department (Domínguez-Vicent, del Águila-Carrasco, Ferrer-Blasco, Montés-Micó), University of Valencia, Valencia, Spain.
authors.forename: Robert
authors.initials: R
authors.lastname: Montés-Micó
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D000328:Adult; D003315:Cornea / Q000503:physiopathology*; D063171:Corneal Pachymetry; D057108:Corneal Wavefront Aberration / Q000503:physiopathology*; D003430:Cross-Sectional Studies; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D010781:Photography / Q000379:methods; D011446:Prospective Studies; D055815:Young Adult