“…50 Research has shown that reaching behavior in 5-month-olds depends more on the infant's motor ability and proprioception than on visual control; no difference is seen between reaching in the dark and reaching in the light. 51 Vision becomes more important as the system matures, as evidenced by more successful reaching with vision in the 7-month-old. 52,53 Achieving and maintaining an upright posture depend on the infant's ability to interpret and respond to information about body sway, which comes from vestibular, visual, and proprioceptive input.…”