The most part or all of the superficial veins were cut off in the traditional double eyelid operation and then the obstruction of the venous blood reflex beneath the incision happened leading to the obvious swelling .
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美[ˌsupɚˈfɪʃəl ˈriˌflɛks]英[ˌsju:pəˈfiʃəl ˈri:ˌfleks]
浅层反射，浅反射