Skew deviation
Skew Deviation
Skew deviation is a vertical eye movement disorder where one eye is higher than the other. This condition is often associated with brainstem or cerebellar lesions.
Pronunciation
Skew deviation is pronounced as /skjuː dɪˈveɪʃ(ə)n/.
Etymology
The term 'skew' is derived from the Old Norse 'skeifr', meaning 'askew', and 'deviation' comes from the Latin 'deviare', meaning 'to turn away'.
Definition
Skew deviation is a vertical misalignment of the eyes, caused by a supranuclear lesion in the brainstem or cerebellum. It is often associated with ocular tilt reaction (OTR), a triad of ocular signs including skew deviation, head tilt, and torsional strabismus.
Symptoms
Patients with skew deviation may experience diplopia (double vision), vertigo (a sensation of feeling off balance), and nystagmus (involuntary eye movement).
Diagnosis
Diagnosis of skew deviation is typically made through a combination of clinical examination, including the cover-uncover test, and neuroimaging studies such as MRI.
Treatment
Treatment for skew deviation is typically aimed at addressing the underlying cause. This may include medications, surgery, or physiotherapy for rehabilitation.
Related Terms
- Ocular tilt reaction
- Diplopia
- Vertigo
- Nystagmus
- Cover test
- Magnetic resonance imaging
- Physical therapy
External links
- Medical encyclopedia article on Skew deviation
- Wikipedia's article - Skew deviation
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