Use of hyaluronic acid gel in the treatment of lagophthalmos in sunken superior sulcus syndrome.

Purpose: To evaluate the use of hyaluronic acid gel in the management of lagophthalmos in sunken superior sulcus syndrome.

Introduction: Lagophthalmos associated with orbital fat atrophy and deep superior sulcus is a known entity described previously. Orbital fat atrophy results in deep superior sulcus where skin, orbicularis muscle, and orbital septum retract posteriorly in the deep superior sulcus, leading to lagophthalmos from suboptimal orbicularis function and effective skin shortening.