P 729
White-to-white cornea diameter measurements using the eyemetrics program of the ORBSCAN topography systemL. Wang1,2, G. U. Auffarth1
Purpose: To measure white-to-white horizontal corneal diameter with the ORBSCAN system.
Methods: Using the ORBSCAN topography system we measured white-to-white horizontal corneal diameter of 26 eyes of 13 healthy volunteers analysing the captured video image with the eyemetrics program implemented. Control measurements were done using a µm-caliber (CB) and the mm-scale of a Goldmann-Perimeter (GP).
Results: Average white-to-white distance was 12.01± 0.35mm with the Orbscan, 11.97± 0.35mm Control-CB and 11.93± 0.35mm Control-GP. Spearman correlation coefficient was 0.91 (p<0.0001) Orbscan vs. Control-CB and 0.93 (p<0.0001) Orbscan vs. Control-GP.
Conclusions: The ORBSCAN topography system allows with its implemented eyemetrics function a reliable and precise measurement of the white-to-white corneal diameter, which is useful for sizing of anterior chamber phakic or pseudophakic intraocular lenses.
1
Universitäts-Augenklinik Heidelberg, INF 400, 69120 Heidelberg