title: Internal spherical aberration by ray tracing-type aberrometry in multifocal pseudophakic eyes.
abstract: OBJECTIVE
  To demonstrate the results of the ray tracing-type aberrometer in measuring spherical aberration (SA) in pseudophakic eyes with monofocal intraocular lens (IOL), aspheric monofocal IOL, or aspheric diffractive multifocal IOL.
  
  
  METHODS
  Total, corneal, and internal SA were measured using iTrace at a 6-mm pupil size in 27 eyes of 27 patients implanted with a monofocal spherical IOL (group 1: Natural, SN60AT), 30 eyes of 30 patients implanted with a monofocal aspheric IOL (group 2: IQ, SN60WF), and 30 eyes of 30 patients implanted with a multifocal aspheric IOL (group 3: ReSTOR, SN6AD1) at 3 months after cataract surgery. We compared the internal SAs of these IOLs in pupil sizes of 3, 4, 5, and 6 mm.
  
  
  RESULTS
  There were no demographic statistically significant differences among the groups. The internal SA of group 1 had a positive value. The internal SA of group 2 was -0.175 ± 0.135 μm in 5-mm pupils and -0.227 ± 0.253 μm in 6-mm pupils. The internal SA of group 3 was -0.072 ± 0.128 μm in 5-mm pupils and -0.173 ± 0.231 μm in 6-mm pupils.
  
  
  CONCLUSIONS
  Measuring internal SA with iTrace yields relatively accurate results in all types of IOLs with adequate pupil sizes.
authors: Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, South Korea.
authors: I
authors: I
authors: Jun
authors: Y J
authors: YJ
authors: Choi
authors: E K
authors: EK
authors: Kim
authors: K Y
authors: KY
authors: Seo
authors: T-I
authors: TI
authors: Kim
mesh_terms: D057128:Aberrometry; D057108:Corneal Wavefront Aberration / Q000175:diagnosis*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D019591:Pseudophakia / Q000209:etiology*; D014792:Visual Acuity / Q000502:physiology