Single eyelid, also known as monolid, means that there is no fold in the upper eyelid. Double eyelid, also known as heavy eyelid, is a condition in which the skin of the upper eyelid has a shallow groove above the lid margin, and when the eyes are opened the skin below this groove moves up, while the skin above this groove hangs loose and folds downward into a horizontal skin crease at the heavy lid groove. The mechanism of eyelid formation is the attachment of the levator aponeurosis to the upper edge of the lid and the skin in front of the lid. In Oriental people, the upper lid is often thick and bloated, and the orbital fat is abundant, preventing the attachment of the levator aponeurosis to the lid plate and skin, resulting in a single eyelid. The medial canthus is a vertical crease of skin in front of the medial canthus. The presence of the medial canthus obscures part of the lacrimal fissure and makes the eye fissure look thin and short, so it is often necessary to correct the medial canthus at the same time as blepharoplasty. Small eyes: Westerners have large eye fissures, thin eyelids, tight orbital septum, and little orbital fat, so they often have large, wide eyes. In Easterners, the upper eyelid is thick and bloated, rich in fatty tissue, and the upper eyelid skin hangs in front of the eyelid margin, so the eyes appear smaller. Wide Eye Spacing: The presence of the medial canthus results in a wide spacing between the medial canthus on both sides. To improve the above problems, to ensure surgical safety and results, it is recommended that you choose a regular hospital, a qualified surgeon, use regular drugs, and perform a standardized surgical procedure.