Double-bellied inferior rectus muscles with aplasia of medial rectus muscles

This report describes a rare occurrence of double-bellied inferior rectus muscle with aplasia of the medial rectus muscle in both eyes of a young woman seeking cosmetic correction for her strabismus. The patient presented with a large-angle exotropia and a −4 limitation of adduction in each eye. On attempted adduction, there was minimal downshoot and upper eyelid retraction. Magnetic resonance imaging of the orbit revealed hypoplastic medial rectus muscles; however, intraoperatively the muscle was not found at the insertion or when traced back as fa r as possible.
Source: Journal of AAPOS - Category: Opthalmology Authors: Tags: Short Report Source Type: research