Why is it difficult to catch a ball with one eye closed?

Catching a ball with one eye closed is difficult because depth perception is significantly compromised. With both eyes open, the brain uses binocular vision to judge distance and speed accurately. Closing one eye reduces the visual field and can lead to miscalculations in timing and position, making it harder to intercept the ball effectively. This diminished spatial awareness can result in missed catches or inaccurate throws.