What this site is for
This is a patient decision guide, not a textbook. The anatomy of the eyelid, the operations performed on it and the anaesthetic involved are explained properly on the Eyelids hub and on Dr. Mao's own site. Repeating that here would help nobody. What this site adds is the part a patient has to do alone: working out which of three different problems is actually under their eyes, deciding whether it needs anything done, recognising the presentations that an operation makes worse, and knowing when to see a doctor instead.
Who writes it
The guides are written by the clinical content team of the Plastic Surgery & Aesthetics Medical Center at Chongqing West District Hospital and medically reviewed by Tongchun Mao, MD, Deputy Director and Head of Aesthetic Surgery, who performs this surgery here. Every page carries the reviewer's name and the date it was last reviewed. Nothing on this site is attributed to a clinician who has not read it.
What we deliberately do not publish
No prices, because a real figure depends on which problem is being treated, whether the operation is combined with anything else, the anaesthetic and the facility, and a number invented for a web page misleads more than it helps. No brand names for medicines or devices. No dosages. No claims that a particular result will be achieved, and no before-and-after images used as evidence, because the result in one face does not predict the result in yours.
The limits of a website
Nothing here can tell you which of the three problems you have. That requires someone to look at your eyelids in movement, in the right light, and to press and lift the tissue — a test that takes under a minute in person and cannot be done through a screen. Use this site to arrive at a consultation with better questions, and treat any answer you receive here as general information rather than advice about you.