Sight is the ability to sense light, and the eye is the organ that senses light.
Light seems to travel in rays or beams.
Sight is the ability to sense rays or beams, and the eye is the organ that senses them.
what is the eye able to sense?

  - sensory neurons
  - sunlight
  - heat or cold
  - rays or beams
  - see details
  - distance
  - Chemical energy
  - photons