Reverse haemodynamic flap has the following advantages: 1, the orbicularis oculi flap is a reverse haemodynamic flap with reliable haemodynamics, which can be rotated by 180° to repair large defects of the upper and lower lids; 2, the color and texture of the flap is close to the recipient area. The color and texture of the flap is close to that of the recipient area. 3. The donor area is hidden and can be sutured directly, which is especially suitable for elderly patients. 4.Safety, because the flap is separated from the superficial surface of the superficial temporal fascia, there is no damage to the facial nerve branches in the deep surface of the superficial temporal fascia, and it does not affect the function of the frontalis muscle and the orbicularis oculi muscle.