How to Measure Ocular Alignment Virtually

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Identifier Ocular_Alignment
Title How to Measure Ocular Alignment Virtually
Creator Olwen Murphy, MD; Daniel R. Gold, DO
Affiliation (OM) Department of Neurology, The Johns Hopkins School of Medicine, Baltimore, Maryland; (DRG) Departments of Neurology, Ophthalmology, Neurosurgery, Otolaryngology - Head & Neck Surgery, Emergency Medicine, and Medicine, The Johns Hopkins School of Medicine, Baltimore, Maryland
Subject Ocular Alignment
Description Ocular alignment: the alternate cover test can be performed by instructing the patient to hold their head steady, fix their eyes on the camera (or a more distant target - the closer the fixation target, the more of an exodeviation the examiner will see), and use their cell phone (or a spoon) to occlude one eye and then the other eye, back and forth. This test can be also be completed with the patient's head held at 20o off center in the horizontal and vertical planes, which may help in localization of abnormalities (e.g. differentiating the alternating hypertropias of bilateral 4th nerve palsies from alternating skew deviation [https://collections.lib.utah.edu/details?id=1383125&q=skew+deviation&fd=title_t%2Cdescription_t%2Csubject_t&facet_setname_s=ehsl_novel_gold]). Look for a horizontal (when the eye under cover is crossed in so that it has to move outward when uncovered to take up fixation - ESO [https://collections.lib.utah.edu/details?id=1256238]; when the eye under cover is deviated outward so that it has to move inward when uncovered to take up fixation - EXO [https://collections.lib.utah.edu/details?id=1253803]) or vertical (generally named after the side of the higher eye - e.g., if the right eye is uncovered and has to come down to fixate on the target, this is a right hyperdeviation) movements of the uncovered eye. The eso-, exo-, hyper is further classified as a tropia (misalignment present with both eyes open - use a cover-uncover technique on each eye individually) or phoria (misalignment present when binocular vision is broken with alternate cover testing but no misalignment with cover-uncover). Any change in deviation or lack thereof helps in the localization.
Date 2022
Language eng
Format video/mp4
Type Image/MovingImage
Collection Neuro-Ophthalmology Virtual Education Library: Dan Gold Collection: https://novel.utah.edu/Gold/
Publisher North American Neuro-Ophthalmology Society
Holding Institution Spencer S. Eccles Health Sciences Library, University of Utah
Rights Management Copyright 2016. For further information regarding the rights to this collection, please visit: https://NOVEL.utah.edu/about/copyright
ARK ark:/87278/s6m83sdh
File Name Ocular_Alignment.mp4
Setname ehsl_novel_gold
ID 1757571
Reference URL https://collections.lib.utah.edu/ark:/87278/s6m83sdh
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