truction of any upper eyelid defect is to supply a stable movable lid ensuring adequate corneal protection and at the same time providing a good aesthetic quality to the donor site. Local advancement of both the anterior and posterior lamella can be done for smaller defects; however, the same is not functionally and cosmetically acceptable in full thickness defects involving more than half of the upper eyelid.

The reconstructive options in such defects include the bridging (eyelid sharing) procedures and the use of complex non-bridging flaps involving free anterior and posterior lamellar grafts, along with orbicularis mobilisation.\[[@ref4]\] The ipsilateral lower eyelid is the preferred donor site option.

The classical eyelid sharing procedure is the Cutler-Beard bridge flap, which can cover large defects in the upper lid, without disturbing the donor lower lid margin. The principle is to bring the full thickness lower eyelid harvested tissue, based on an inferior pedicle, across the cornea to fill the upper eyelid defect. The flap is divided four to eight weeks after surgery at the level of the upper eyelid margin. The disadvantage of this flap is the absence of tarsus, often resulting in lack of stability of the upper lid, and a persistent lower lid instability, due to disruption of the lower eyelid retractors, moreover, there is also no lid margin or eyelashes in the reconstructed flap.\[[@ref5]\] Several modifications to the classical Cutler Beard flap have been described to address the above limitations.\[[@ref5]\]

The switch flap, another lid sharing flap, was originally described for correction of upper eyelid defects by Mustarde and later by Collin and Tyers. It is a transposition flap similar to the Abbe flap traditionally described for lip reconstruction. In this technique a full thickness flap based on a medial or lateral pedicle is transposed from the lower eyelid to the upper eyelid or vice versa.\[[@ref6]\] The flap needs to be at least 4 mm wide in order to include the marginal arcade, as it is