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Hwan Heo, MD; Seung Hyun Lee, MD; Kyung Chul Yoon, MD; Yeoung Geol Park, MD; Sang Woo Park, MD

Arch Ophthalmol. 2008;126(12):1776-1778.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Y-pattern exotropia is a rare condition that cannot be corrected by conventional surgical methods used for V-pattern deviation. It has been proposed that lateral rectus (LR) muscle co-contraction during elevation causes Y-pattern exotropia.¹ However, the precise mechanism is still not known. This article describes a patient with Y-pattern exotropia with pulley instability as revealed by magnetic resonance imaging (MRI). The patient's condition was improved through rectus muscle transposition.

Report of a Case

An 8-year-old girl had exodeviation during upgaze since age 1 year. She did not have diplopia and had no history of strabismus surgery. She had orthophoria in primary position and downgaze. In upgaze, she had 40 prism diopters (PD) of exotropia at distance and at near. She showed no hyperdeviation in horizontal side gaze but had paradoxical abduction of the normally adducting eye . . . [Full Text of this Article]

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