- Around 95% of animal have.Some have simple eyes, just picking up light and dark condition.Other have complex eyes, detecting colour, shape and depth.
- The central part of the eye is known as the pupil and it changes size depending on amount of light entering the eye.
- An owl can see a moving mouse more than 150 feet away.
- Scorpions can have as many as 12 eyes , but the box jelly has 24!
- The colossal squid has largest eyes, measuring around 27cm across.
- A worm has no eyes at all.