Sight is part of the peripheral nervous system.
Internally it is the Nervous System. Externally it is the Sensory system (touch, sight, smell, taste, hearing) and the voice.
other body poo
The eyes are a body part that gathers information about its surroundings through the sense of sight. They detect light and color, allowing us to see and understand the world around us.
The hips and knees are part of the musculoskeletal system, which is responsible for movement, support, and protection of the body. They are also considered part of the lower limb system.
The spinal cord is part of the central nervous system which itself it part of the nervous system.