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Orbit. 2015 Feb;34(1):23-9. doi: 10.3109/01676830.2014.963877. Epub 2014 Oct 14.

Parallax-free exophthalmometry: a comprehensive review of the literature on clinical exophthalmometry and the introduction of the first parallax-free exophthalmometer.

Author information

1
Orbital Center, Department of Ophthalmology, Academic Medical Center, University of Amsterdam , Amsterdam , The Netherlands , and.

Abstract

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 (1.6 mm) 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.

KEYWORDS:

Exophthalmometer; exophthalmometry; exophthalmos; parallax error; proptosis

PMID:
25313439
DOI:
10.3109/01676830.2014.963877
[Indexed for MEDLINE]

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