has part has part has_part characteristic of part of has modifier abnormal skeletal muscle morphology abnormal eye muscle morphology abnormal extraocular muscle morphology abnormal extra-ocular muscle morphology any structural anomaly of any of the striated muscles that are located within the orbit but are extrinsic and separate from the eyeball itself and control the movements of the eyeball and the superior eyelid; there are seven extraocular muscles: superior rectus, inferior rectus, medial rectus, lateral rectus, inferior oblique, superior oblique, and levator palpebrae superioris MPheno.ontology MP:0005247 http://teachmeanatomy.info/head/organs/eye/extraocular-muscles/ https://en.wikipedia.org/wiki/Extraocular_muscles morphology abnormal extra-ocular muscle