squint

(used especially of glances) directed to one side with or as if with doubt or suspicion or envy.

Abnormal alignment of one or both eyes.

The act of squinting; looking with the eyes partly closed.

Cross one's eyes as if in strabismus.

“The children squinted so as to scare each other”

Be cross-eyed; have a squint or strabismus.

Partly close one's eyes, as when hit by direct blinding light.

“The driver squinted as the sun hit his windshield”