title: Changes in ocular wavefront aberrations and retinal image quality with objective accommodation.
abstract: OBJECTIVE
  To evaluate changes in ocular wavefront aberrations and retinal image quality with objective accommodation in normal human eyes.
  
  
  METHODS
  Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
  
  
  METHODS
  Cohort study.
  
  
  METHODS
  Healthy emmetropic eyes were measured with an iTrace wavefront aberrometer while the subjects fixated at far (6.0 m) and near (40 cm). Wavefront data were analyzed with 3.0 mm and 5.0 mm pupil diameters. The influence of higher-order aberrations (HOAs) on retinal image quality was simulated by computing the modulation transfer function (MTF) from the wavefront aberrations.
  
  
  RESULTS
  Eighty-two eyes of 42 subjects were evaluated. The root mean square values of total HOAs before and after accommodation with 5.0 mm pupils were statistically significantly different (P=.021). In particular, total spherical aberrations became more negative with accommodation, and the difference was statistically significant with 3.0 mm and 5.0 mm pupils (both P<.001). The MTF curves were significantly different before and after accommodation at 5 cycles per degree (cpd) and 10 cpd with 5.0 mm pupils (P=.031 and P=.045, respectively).
  
  
  CONCLUSIONS
  Ocular wavefront aberrations and retinal image quality changed with accommodation in normal human eyes. Total spherical aberration changed more than other HOAs with accommodation.
authors.affiliation: Laboratory of Ophthalmology and Visual Science, Korean Eye Tissue and Gene Bank Related to Blindness, St. Vincent Hospital, Seoul, Korea.
authors.forename: Ying-Jun
authors.initials: YJ
authors.lastname: Li
authors.forename: Jin A
authors.initials: JA
authors.lastname: Choi
authors.forename: Hyojin
authors.initials: H
authors.lastname: Kim
authors.forename: Seung-Young
authors.initials: SY
authors.lastname: Yu
authors.forename: Choun-Ki
authors.initials: CK
authors.lastname: Joo
mesh_terms: D057128:Aberrometry; D000065:Accommodation, Ocular / Q000502:physiology*; D000328:Adult; D057108:Corneal Wavefront Aberration / Q000503:physiopathology*; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology; D006801:Humans; D008297:Male; D011680:Pupil / Q000502:physiology; D012160:Retina / Q000502:physiology*; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult