This case report explores unilateral surgical correction of 30 PD hypertropia in an adult with inferior oblique over action, suggesting a new procedure may offer optimal outcomes.
Inferior oblique over action (IOOA) is a common ocular motility disorder causing elevation of the affected eye in adduction. It can be primary with unknown etiology or secondary to superior oblique palsy. The evolution of surgical procedures done to weaken the muscle began with tenotomy, myectomy, recession, disinsertion and now to anteriorization of inferior oblique muscle. In recent times, emphasis has shifted from bilateral to unilateral muscle surgeries, yet with optimal outcome. In this case report, Antero-nasal transposition of inferior oblique is one such procedure explored to treat hypertropia as high as 30 PD due to primary IOOA.
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Katta et al. (2022) studied this question.
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