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Clinical evaluation of the Bio-Pen for axial length measurement
1Department of Ophthalmology, University of Southern California, Los Angeles.
Journal of Cataract and Refractive Surgery
|January 1, 1990
Abstract:
The axial length of 207 eyes was evaluated in a clinical comparison between the Bio-Pen biometric ruler and the Kretz 7200 MA A-scan unit. The overall correlation was 0.99. The Bio-Pen measurement averaged 0.056 mm shorter than the Kretz. The difference was statistically significant (P less than .0001). The Bio-Pen was found to be a convenient and clinically accurate biometer.