title: Scheimpflug image-based changes in anterior segment parameters during accommodation induced by short-term reading.
abstract: OBJECTIVE
  To analyze the effect of the accommodation on the anterior segment data (corneal and anterior chamber parameters) induced by short-time reading in a healthy, nonpresbyopic adult patient group.
  
  
  METHODS
  Images of both eyes of nonpresbyopic volunteers were captured with a Scheimpflug device (Pentacam HR) in a nonaccommodative state. Fifteen minutes of reading followed and through fixation of the built-in target of Pentacam HR further accommodation was achieved and new images were captured by the device. Anterior segment parameters were observed and the differences were analyzed.
  
  
  RESULTS
  Fifty-two healthy eyes of 26 subjects (range 20.04-28.58 years) were analyzed. No significant differences were observed in the keratometric values before and after the accommodative task (p = 0.35). A statistically significant difference was measured in the 5.0-mm-diameter and the 7.0-mm-diameter corneal volume (p = 0.01 and p = 0.03) between accommodation states. Corneal aberrometric data did not change significantly during short-term accommodation. Significant differences were observed between nonaccommodative and accommodative states of the eyes for all measured anterior chamber parameters.
  
  
  CONCLUSIONS
  Among the parameters of the cornea, only corneal volume changed during the short-term accommodation process, showing some fine changes with accommodation of the cornea in young, emmetropic patients. The position of the pupil and the anterior chamber parameters were observed to change with accommodation as captured by a Scheimpflug device.
authors.affiliation:  Department of Ophthalmology, Josa Andras Hospital, Nyíregyháza - Hungary.
authors.forename: Agnes
authors.initials: A
authors.lastname: Lipecz
authors.affiliation:  Department of Ophthalmology, Josa Andras Hospital, Nyíregyháza - Hungary.
authors.forename: Alexis
authors.initials: A
authors.lastname: Tsorbatzoglou
authors.affiliation:  Orbi-Dent Health and Laser Center, Debrecen - Hungary.
authors.forename: Ziad
authors.initials: Z
authors.lastname: Hassan
authors.affiliation:  Department of Ophthalmology, University of Debrecen, Debrecen - Hungary.
authors.forename: Andras
authors.initials: A
authors.lastname: Berta
authors.affiliation:  Department of Ophthalmology, University of Debrecen, Debrecen - Hungary.
authors.forename: Laszlo
authors.initials: L
authors.lastname: Modis
authors.affiliation:  Department of Ophthalmology, Borsod-Abaúj-Zemplén County Hospital and University Teaching Hospital, Miskolc - Hungary.
authors.forename: Gabor
authors.initials: G
authors.lastname: Nemeth
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D000328:Adult; D000867:Anterior Chamber / Q000000981:diagnostic imaging* / Q000502:physiology; D003941:Diagnostic Techniques, Ophthalmological; D058453:Emmetropia / Q000502:physiology*; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D010781:Photography / Q000379:methods*; D011680:Pupil / Q000502:physiology; D011932:Reading; D055815:Young Adult