title: Correlation between different measurements within the eye relative to phakic intraocular lens implantation.
abstract: OBJECTIVE
  To obtain measurements of the white-to-white distance and the anterior chamber and ciliary sulcus diameters in phakic human eyes obtained post-mortem to find a correlation between these measurements.
  
  
  METHODS
  David J. Apple, MD Laboratories for Ophthalmic Devices Research, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
  
  
  METHODS
  Twenty-two phakic human eyes obtained from eye banks within 24 hours of death were evaluated. The following measurements were performed: white-to-white distance, anterior chamber diameter with a plastic sizer after a small limbal incision, and anterior chamber and ciliary sulcus diameters after fixation and sagittal section of the eyes. The first 10 eyes were studied at the 6 o'clock to 12 o'clock meridian and the last 12 eyes, at the 3 o'clock to 9 o'clock meridian.
  
  
  RESULTS
  A positive correlation was found between the white-to-white measurements and the anterior chamber diameter in the 10 eyes studied at the 6 o'clock to 12 o'clock meridian but not in the 12 eyes studied at the 3 o'clock to 9 o'clock meridian. The latter is the meridian frequently used by surgeons to perform white-to-white measurements and thus choose the overall size of the phakic intraocular lens to be implanted. No correlation was found between the white-to-white measurements and the ciliary sulcus diameter in the 2 meridians.
  
  
  CONCLUSIONS
  Experimental studies using cadaver eyes are helpful in evaluating sizing techniques for phakic IOL implantation as well as in better understanding the anatomical relationships between ocular structures.
authors.affiliation: David J. Apple, MD Laboratories for Ophthalmic Devices Research, John A. Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA. liliana.werner@hsc.utah.edu
authors.forename: Liliana
authors.initials: L
authors.lastname: Werner
authors.forename: Andrea M
authors.initials: AM
authors.lastname: Izak
authors.forename: Suresh K
authors.initials: SK
authors.lastname: Pandey
authors.forename: David J
authors.initials: DJ
authors.lastname: Apple
authors.forename: Rupal H
authors.initials: RH
authors.lastname: Trivedi
authors.forename: Josef M
authors.initials: JM
authors.lastname: Schmidbauer
mesh_terms: D000368:Aged; D000867:Anterior Chamber / Q000033:anatomy & histology*; D001699:Biometry; D001837:Body Weights and Measures; D002924:Ciliary Body / Q000033:anatomy & histology*; D003315:Cornea / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged