A young male with no past medical history presents to the emergency department after assault. He was punched multiple times in the face and has since noted double vision, worse with upward gaze. Examination revealed right peri-orbital edema with associated limitation to upward gaze.
CT Maxillofacial Non-contrast
Inferior orbital wall fracture with herniation of the inferior rectus muscle.
Extraocular Muscle Actions:
Affected Anatomic Sites in Diplopia:
Coordinated eye positioning is affected by voluntary movements (requiring cranial nerve control for conjugate eye movements), vergence (for depth adjustments), as well as reflexive adjustments for head movement (requiring vestibular input). As with any motor activity, neuromuscular control must be normal with unrestricted movement of the globe within the orbit.
Algorithm for the Evaluation of Diplopia:
Diplopia has been explored previously on ddxof. The earlier algorithm was focused on identifying the paretic nerve. This algorithm uses features of the history and physical examination to identify potential etiologic causes of diplopia.
- Rucker JC, Tomsak RL. Binocular diplopia. A practical approach. Neurologist. 2005;11(2):98-110. doi:10.1097/01.nrl.0000156318.80903.b1.
- Friedman DI. Pearls: diplopia. Semin Neurol. 2010;30(1):54-65. doi:10.1055/s-0029-1244995.
- Alves M, Miranda A, Narciso MR, Mieiro L, Fonseca T. Diplopia: a diagnostic challenge with common and rare etiologies. Am J Case Rep. 2015;16:220-223. doi:10.12659/AJCR.893134.
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- Marx J, Walls R, Hockberger R. Rosen’s Emergency Medicine – Concepts and Clinical Practice. 8 ed. Elsevier Health Sciences; 2013:176-183.
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- Low L, Shah W, MacEwen CJ. Double vision. BMJ. 2015;351:h5385. doi:10.1136/bmj.h5385.
- Danchaivijitr C, Kennard C. Diplopia and eye movement disorders. J Neurol Neurosurg Psychiatry. 2004;75 Suppl 4:iv24-iv31. doi:10.1136/jnnp.2004.053413.
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History and Physical
38F with no medical history, presenting with double vision. The patient reported six weeks of intermittent diplopia for which she had presented to this hospital previously. She was briefly admitted for evaluation of possible cranial nerve IV palsy. Extensive imaging was unremarkable, without mass lesion, infarction, vascular malformation, or meningeal enhancement. She was discharged with outpatient follow-up including ophthalmology clinic and further imaging.
The patient represented due to persistent diplopia that is worse with right gaze. The diplopia is predominantly vertical, alleviated by head tilt. Now associated with three days of right ptosis as well as two weeks of progressive weakness and fatigue – most notable when climbing stairs.
Examination notable for right hypertropia increased on right or downward gaze suggestive of isolated inferior rectus weakness. Pupils were equal and reactive. There was marked fatigable ptosis with 2mm right palpebral fissure compared to 10mm on contralateral side. Symmetrical muscle weakness was noted, 4/5 neck flexion, elbow extension, wrist flexion/extension, shoulder abduction, hip flexion. Gait was wide-based. Application of ice for 5 minutes improved right palpebral fissure opening to >7mm.
Further evaluation included CXR and CT chest with intravenous contrast which did not identify a mediastinal mass. The patient’s respiratory status remained stable throughout hospitalization as assessed by measurements of forced vital capacity. On hospital day one, an edrophonium test was performed which was positive. The patient was started on pyridostigmine, completed a course of IVIG and was discharged with outpatient neurology follow-up.
Evaluation of Diplopia 1
- Direction of gaze with worst diplopia
- Orientation (vertical/horizontal)
- Associated symptoms (headache, vertigo, dysarthria, eye pain)
Terms Describing Eye Position
Tropias are always present, phorias are identified by cross-cover testing (break fusion)
Algorithm for the Evaluation of Diplopia 2
Causes of Diplopia 3,4,5,6
||Variable. Abrupt restriction of movement
|Thyroid eye disease
|Isolated CN III
||Pain, risk factors, pupil-sparing
|Isolated CN IV
||Limited downgaze (hypertropia)
||May be mild
||Less common than CN III
|Isolated CN VI
||Less common than CN III
||Dysarthria, ataxia, facial weakness
|Multiple CN involvement (III, IV, VI)
||Cavernous sinus process
||Retroorbital pain, conjunctival injection or chemosis
||Weakness, dysmetria, tremor
|Basilar artery occlusion
||Vertigo, slurred speech
||AMS, ataxia, nystagmus
||Fever, photophobia, meningismus
||Fatigability, ice test
- Alves, M., Miranda, A., Narciso, M. R., Mieiro, L., & Fonseca, T. (2015). Diplopia: a diagnostic challenge with common and rare etiologies. The American journal of case reports, 16, 220–223. doi:10.12659/AJCR.893134
- Borooah, S., Wright, M., & Dhillon, B. (2011). Pocket Tutor Ophthalmology. JP Medical Limited. Retrieved from https://books.google.com/books?id=z\_CfWj8-ftoC
- Dinkin, M. (2014). Diagnostic approach to diplopia. Continuum (Minneapolis, Minn.), 20(4 Neuro-ophthalmology), 942–965. doi:10.1212/01.CON.0000453310.52390.58
- Rucker, J. C., & Tomsak, R. L. (2005). Binocular diplopia. A practical approach. The neurologist, 11(2), 98–110. doi:10.1097/01.nrl.0000156318.80903.b1
- Friedman, D. I. (2010). Pearls: diplopia. Seminars in neurology, 30(1), 54–65. doi:10.1055/s-0029-1244995
- Guluma, K. (2013). Diplopia. In Rosen’s Emergency Medicine – Concepts and Clinical Practice (8th ed., Vol. 1, pp. 176-183). Elsevier Health Sciences.
- WikEM: Diplopia