The cost of opening the corner of the eye is about 2000 to 5000 yuan. It is to correct and enlarge the inner and outer canthus by surgery, remove the epicanthus and extend the horizontal length of the fissure, so as to achieve the effect of expanding the eyeball. Attention should be paid to avoid using anticoagulants within 2 weeks before canthotomy, and avoid physiological period and pregnancy during operation.