Parallax-free Exophthalmometry: A Comprehensive Review of the Literature on Clinical Exophthalmometry and the Introduction of the First Parallax-Free Exophthalmometer

摘要

Purpose: To present the first parallax-free exophthalmometer design. Background: Exophthalmometry is an important clinical tool. We provide a historic overview of clinical exophthalmometer designs, and we review current problems encountered in exophthalmometry. Methods: We present a new and parallax-free exophthalmometer design that we have evaluated in 49 patients visiting our orbital clinic. Results: The mean age of the patients was 49.8 years and 72 were female. The Pearson interobserver variation was 0.97, and 94 of the Hertel values measured by the two observers were within the limits (1.6mm) of agreement. Conclusion: This meter appears to be a reliable instrument for exophthalmometry. It is the first instrument that allows for a complete parallax-free measurement.