He is a Specialist in Ophthalmology and serves as an Honorary Clinical Assistant Professor at HKU. Dr. Marcet is a Diplomate of the American Board of Ophthalmology. He is the Editor-in-Chief of the American Academy of Ophthalmology's medical wiki, known as EyeWiki. Dr. Marcet's subspecialty focus is on ophthalmic plastic and reconstructive surgery (also known as oculoplastic surgery), which includes management of cosmetic and functional conditions of the eyelids, face, orbit and tear drainage system.