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►Comparison of Measuring Methods of Corneal Thickness with Orbscan System and Sonogage Pachymeter in Pre and Post LASIK Treatment◄
中華民國眼科學會學術討論會論文摘要
Academic and Annual
Meeting of the Ophthalmological 第五屆國際眼科專題演講會暨第四十二次學術演講會(九十年十二月八日~九日)
ABSTRACT
FORM
Comparison
of Measuring Methods of Corneal Thickness
張朝凱、陳德照*
台北博仁醫院、長虹診所、德照眼科診所＊
Purpose：To
evaluate corneal thickness with the Orbscan topography system and the
Sonogage ultrasonic pachymeter in pre and post-LASIK eyes to determine the
different effects of LASIK on these measurements
Method：We
measure central corneal thickness of right eyes in 30 patients before and
after LASIK using both Orbscan and Ultrasonic pachymeter
Results：The
ultrasound instrument consistently measured a greater corneal thickness
than Orbscan pachymeter .With the retrospectively review , the mean
difference between ultrasound and Orbscan pachymeter was 15.6＋/－9.6
and 35.2＋/－18.5
in pre and postoperative eyes respectively ( p 0.092 ).
Conclusion：Ultrasound pachymeter consistently measures thicker than Orbscan pachymeter ; and there is particular interest as to the reliability of post-LASIK central pachymeter because of concern regarding corneal bed thickness for LASIK enhancements ; therefore , it is reassuring that postoperative Orbscan measurements are consistently lower and more conservative than ultrasound measurements.
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