Bell's phenomenon

Involuntary eye movement, as elicited by Bell's phenomenon, for instance, may be closer to normal.

Bell's phenomenon: An upward movement of the eye and the eyelid which occurs when a person affected with Bell's paralysis tries to close the eye.

Bell's phenomenon is a medical sign that allows observers to notice an upward and outward movement of the eye, when an attempt is made to close the eyes.

Bell's phenomenon is a normal defence reflex present in about 75% of the population, resulting in elevation of the globes when blinking or when threatened (e.g. when an attempt is made to touch a patient's cornea).