May 2004
Volume 45, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2004
White–to–white corneal diameter norm evalution with the Orbscan II system
Author Affiliations & Notes
  • F. Rüfer
    Ophthalmology, Hannover Medical School, Hannover, Germany
  • A. Schröder
    Ophthalmology, Hannover Medical School, Hannover, Germany
  • M. Meyer
    Ophthalmology, Hannover Medical School, Hannover, Germany
  • C. Erb
    Ophthalmology, Hannover Medical School, Hannover, Germany
  • Footnotes
    Commercial Relationships  F. Rüfer, None; A. Schröder, None; M. Meyer, None; C. Erb, None.
  • Footnotes
    Support  none
Investigative Ophthalmology & Visual Science May 2004, Vol.45, 2871. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      F. Rüfer, A. Schröder, M. Meyer, C. Erb; White–to–white corneal diameter norm evalution with the Orbscan II system . Invest. Ophthalmol. Vis. Sci. 2004;45(13):2871.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Abstract: : Purpose:The white–to–white corneal diameter shows abnormalities in microcornea, relative anterior microphthalmus, corneal dystrophies and other diseases. It is an important information for planning of surgical procedures like anterior chamber IOLs. As norm values are not exactly known, purpose of this study was to evaluate the white–to–white corneal diameter in healthy subjects. Methods:White–to–white was measured by the Orbscan II system in 370 right eyes and 373 left eyes of 390 healthy subjects aged from 10 – 80 years. 148 were female, 242 were male. Each measurement was repeated twice. Differences in gender, between right and left eyes and age–related alterations were analyzed statistically. Results:The average white–to–white was 11.71 ± 0.42 mm. The average white–to–white in males was 11.77 ± 0.37 mm, in females 11.64 ± 0.47 mm. The resulting normal ranges were 11.04 to 12.50 for males and 10.70 to 12.58 mm for females. Differences in gender proved to be not significant in t–test for independent samples (p=0.071). There were no statistically significant differences between right and left eyes in t–test for dependent samples (p=0.16). Corneal diameters slightly decreased with age. Conclusions:With the received norm values, a more precise diagnostic and planning of surgical procedures is possible in future. Data of the horizontal corneal diameter should contain facts about gender and age.

Keywords: refractive surgery: corneal topography • cornea: basic science • anatomy 
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×