exophthalmometer

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]

exophthalmometer

[ek′səfthalmom′ətər]
Etymology: Gk, exo + ophthalmos, eye, metron, measure
an instrument used for measuring the degree of forward displacement of the eye in exophthalmos. The device allows measurement of the forward distance of the lateral orbital rim to the front of the cornea.

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]

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.
References in periodicals archive ?
The severity of proptosis can be quantified and monitored by either an exophthalmometer or radiologically with orbital scans.