Tuesday, 19 April 2016 07:55

Shark Vision Facts

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

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