Dermatochalasis of Upper Eyelid

The goal of this clinical trial is to determine whether buffering, warming, or addition of hyaluronidase or tranexamic acid to lignocaine during eyelid injection of local anaesthesia reduce injection pain and procedure-related pain and improve perioperative haemostasis.

This study will compare two surgery techniques used for upper eyelid (eyelift) surgery: traditional surgery and a newer method called Ziplyft (a non-powered, hand-held clamp). This study will use a "split-face" design, meaning one eyelid will be treated with the traditional surgery method and the other with Ziplyft, allowing a direct side-by-side comparison. The objectives of the study are to compare Ziplyft treatment vs. traditional surgery by evaluating bruising, wound closure and incision, surgery case time, and subject/surgeon surveys.