The field of microsurgery is unique in that it is both a surgical subspecialty and a technique. Microsurgical techniques are characterized by the utilization of magnification devices, such as operating microscopes and optical loupes, to enhance the ability to visualize what cannot be seen by the naked eye [1,2].
The upper eyelid is wide, resembling a curtain-like tissue which is located above the anterior palpebral fissure of the eye. Its upper boundary is the lower edge of the eyebrow, which roughly coincides with the superior orbital margin.