ex·oph·thal·mom·e·ter
(ek'sof-thal-mom'ĕ-tĕr), An instrument to measure the distance between the anterior pole of the eye and a fixed reference point, often the zygomatic bone.
[exophthalmos + G. metron, measure]
Farlex Partner Medical Dictionary © Farlex 2012
ex·oph·thal·mom·e·ter
(eks'of-thal-mom'ĕ-tĕr) An instrument to measure the distance between the anterior pole of the eye and a fixed reference point, often the zygomatic bone.
[exophthalmos + G. metron, measure]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
exophthalmometer
Instrument for measuring the amount of exophthalmos (or enophthalmos). There are several types, the most common being the Hertel exophthalmometer: it measures the distance between the corneal apex and the apex of the deepest angle of the lateral orbital margin of both eyes simultaneously, using either mirrors or prisms and a superimposed millimetre scale. The normal range varies between 12 mm and 21 mm and a difference between the eyes greater than 2 mm is suspicious.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann