CPT® Code 67318

The CPT® Code 67318 refers to strabismus surgery involving any procedure on the superior oblique muscle of the eye. The superior oblique muscle plays a crucial role in eye movement and is located at the superolateral aspect of the globe. It passes through a specialized tendon known as the trochlea, which is situated at the medial or nasal side of the orbit, and ultimately attaches to the posterior aspect of the orbit. This code encompasses various surgical interventions targeting the superior oblique muscle, with the specific procedure performed being contingent upon the underlying condition being addressed. For instance, one notable surgical technique associated with this code is the Harada-Ito procedure, which is specifically designed to correct eye misalignment resulting from cranial nerve IV palsy. During this procedure, an incision is made in the conjunctiva directly over the superior oblique muscle, allowing access to the muscle and its tendon. The tendon is then split, and the anterior fibers are repositioned in an anterior and lateral direction before being reattached to the globe. Finally, the conjunctival incision is meticulously closed with sutures, ensuring proper healing and alignment of the eye.