What do you mean by pinching eight eyes?

Strabismus

Pinch eight eyes, which means squint in Shanghai dialect, means that the eyes are oblique and inaccurate. Eight eyes are usually interpreted as open eyes, which is a bad description.

There are many kinds of eye shapes. The most common eye types in life are peach eye, phoenix eye, willow eye, apricot eye, round eye, hanging eye and triangular eye.