Your eye muscles are the most active in your body and are 100 times stronger than they need to be.

The extraocular muscles consist of six distinct muscles that control the movement of the eye and one that lifts the eyelid. These muscles are incredibly powerful relative to the small weight of the eyeball. This biological 'over-engineering' ensures that the eyes can move with extreme precision and speed without ever experiencing fatigue.On average, the human eye performs about 100,000 saccades, which are quick, simultaneous movements of both eyes in the same direction, every single day. This level of activity is equivalent to a human walking 80 kilometers (50 miles) daily. The muscles are composed of a unique mix of fiber types that allow for both rapid bursts of speed and long-term endurance.During the Rapid Eye Movement (REM) phase of sleep, first identified by researchers Eugene Aserinsky and Nathaniel Kleitman in 1953, these muscles remain highly active. Even though the rest of the body's voluntary muscles are paralyzed during sleep to prevent acting out dreams, the eye muscles continue to dart back and forth. This constant activity makes them the most utilized muscle group in the entire human anatomy.