1. Effective up to 25 meters
  2. 10 times greater than humans in clear water
  3. Eyes very similar to humans – cornea , lens, retina, iris, pupil
  4. Contains rods and cones so can detect colour and see in low light – new research (2011) shows not all sharks have the same cones cells, bull sharks cannot see in colour.
  5. Tapetum lucidum – detects very small amounts of light which is why they can see in very murky water
  6. Can see out of the water as well – pupil dilation
  7. Iris is a vivid blue colour
  8. Nictitating membrane (eye lid) lacking in great whites so they roll their eye back for protection