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Hertel exophthalmometers take a measurement from the lateral orbital rim to the corneal apex. If a patient presents with an orbital fracture or after lateral orbitotomy, the use of a Hertel exophthalmometer may be complicated because the lateral orbital rim serves as a reference point for this instrument.
effectively two small canulae fitted together, one to introduce fluid and the other to extract the cortical materials, blood, etc. in eye operations •Lacrimal canula small curved canula the size of a syringe needle used to introduce fluids or drugs into the nasolacrimal passage to test its patency or during surgery ( dacrocystography ...
After the First World War, Hertel moved to Berlin before leaving for the University of Leipzig in 1920, where he remained until his retirement in 1935. Hertel invented the Hertel exophthalmometer, a method of measuring eye displacement. With his colleague, Jakob Stilling, he developed the Stilling-Hertel test for colour vision deficiency.
Exophthalmos (also called exophthalmus, exophthalmia, proptosis, or exorbitism) is a bulging of the eye anteriorly out of the orbit.Exophthalmos can be either bilateral (as is often seen in Graves' disease) or unilateral (as is often seen in an orbital tumor).
Hertel & Reuss was a manufacturer of optical instruments based in Kassel, Germany, which emerged around 1995 following the bankruptcy of its predecessor company (founded in 1927 by Otto Hertel and Eduard Reuss.) The owners of Hertel & Reuss KG were Herr Eduard Reuss and his two sons Herr Gerhard Reuss and Herr Helmut Reuss.
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The prism cover test (PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists, orthoptists, and optometrists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]
The anterior chamber angle is a part of the eye located between the cornea and iris which contains the trabecular meshwork.The size of this angle is an important determinant of the rate aqueous humour flows out of the eye, and thus, the intraocular pressure.