Opening the corner of the eye is to enlarge the inner canthus angle or the outer canthus angle by surgery to achieve the effect of prolonging the eye fissure. Clinically, there are more operations to open the inner canthus than the outer canthus, mainly because the effect of opening the canthus is better than that of the outer canthus.

There are two ways to open the inner canthus: one is to open the inner canthus; The other is that the width of the inner canthus is Z-shaped. It is necessary to choose different methods such as light, medium and heavy according to the degree of epicanthus, so as to achieve better eye opening effect.