How many extraocular muscles are responsible for moving each eye?

Each eye is moved by six extraocular muscles. These muscles work together to enable various eye movements, including up, down, left, right, and rotational movements. The six muscles are categorized into four rectus muscles, which are responsible for moving the eye straight in different directions, and two oblique muscles, which allow for rotary movements and help in coordination of the eye's position.

Having this knowledge is crucial for understanding human anatomy and the mechanics of eye movement, especially in fields such as optometry, ophthalmology, and even in specific areas such as neurology, where eye movements can indicate certain neurological conditions. The presence of six muscles allows for a wide range of coordinated movements essential for activities like tracking and focusing on objects. Other options do not account for the correct number of muscles associated with eye movement.