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 ?
There was a 4 mm proptosis of the left eye compared with the right eye, measured with an exophthalmometer.
The following ophthalmology parameters were analyzed: proptosis degree measured with Oculus Hertel exophthalmometer, ocular pressure, best-corrected visual acuity (BCVA), presence of lagophthalmos, and preservation of color vision.
The MDCT and Hertel exophthalmometer measurements are presented in Table 2.
Besides, the type of exophthalmometer, patient and examiner factors influence measurement when using Hertel method.
15) measured proptosis using Hertel exophthalmometer in 2477 Turkish subjects.
Interinstrument variability in Hertel-type exophthalmometers.
Intraocular Pressure (IOP) was measured by Goldmann applanation tonometer and proptosis was measured with Hertel's exophthalmometer.
The severity of proptosis can be quantified and monitored by either an exophthalmometer or radiologically with orbital scans.
Measured by Hertel exophthalmometer, 20 mm of proptosis was found in right eye and 22 mm in left eye.
Interinstrument Variability in Hertel Type Exophthalmometers.