Phakometric measurement of ocular surface radius of curvature and alignment: evaluation of method with physical model eyes

Jean-Cyriaque Barry, Mark Dunne, Thomas Kirschkamp

Research output: Contribution to journalArticle

Abstract

Ophthalmophakometric measurements of ocular surface radius of curvature and alignment were evaluated on physical model eyes encompassing a wide range of human ocular dimensions. The results indicated that defocus errors arising from imperfections in the ophthalmophakometer camera telecentricity and light source collimation were smaller than experimental errors. Reasonable estimates emerged for anterior lens surface radius of curvature (accuracy: 0.02–0.10 mm; precision 0.05–0.09 mm), posterior lens surface radius of curvature (accuracy: 0.10–0.55 mm; precision 0.06–0.20 mm), eye rotation (accuracy: 0.00–0.32°; precision 0.06–0.25°), lens tilt (accuracy: 0.00–0.33°; precision 0.05–0.98°) and lens decentration (accuracy: 0.00–0.07 mm; precision 0.00–0.07 mm).
Original languageEnglish
Pages (from-to)450-460
Number of pages11
JournalOphthalmic and Physiological Optics
Volume21
Issue number6
DOIs
Publication statusPublished - Nov 2001

Keywords

  • defocus errors
  • imperfections
  • ophthalmophakometer camera
  • telecentricity
  • light source collimation

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