title: Statistical analysis of physiological aberrations of the cornea.
abstract: OBJECTIVE
  To determine corneal aberrometric values in a normal population.
  
  
  METHODS
  Corneal topography from a group of 4340 patients was retrospectively evaluated. Exclusion criteria were applied in order to select a population with good visual acuity, no previous ocular surgery, no contact lens influence, and no corneal disease. Aberrometric analysis of the corneal wavefront derived from the topographical data of the selected population was performed. Topography from 500 patients (1000 eyes) was selected for Zernike analysis of the corneal surface, with coefficients derived up to the tenth order.
  
  
  RESULTS
  Corneal surface aberration values related to different pupil diameter were determined.
  
  
  CONCLUSIONS
  This preliminary study provided reference values for corneal aberrations in the normal population.
authors.affiliation: Deparment of Ophthalmology, Istituto Clinico Humanitas, Milan, Italy. paolo.vinciguerra@humanitas.it
authors.forename: Paolo
authors.initials: P
authors.lastname: Vinciguerra
authors.forename: Fabrizio I
authors.initials: FI
authors.lastname: Camesasca
authors.forename: Antonio
authors.initials: A
authors.lastname: Calossi
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003315:Cornea / Q000502:physiology*; D003316:Corneal Diseases / Q000503:physiopathology; D019781:Corneal Topography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011680:Pupil / Q000502:physiology; D012016:Reference Values; D012029:Refraction, Ocular; D012189:Retrospective Studies