eye, n.Trivia

The earthworm is eyeless, but is able to sense light and avoids it

The human eye is efficient enough to see a candle flame in darkness from 1.7 miles (2.76 km) away.

Earthworms have no arms, legs or eyes

Owls can't move their eyes from side to side

An ostrich's brain is smaller than its eye.

The human eye can detect more shades of green than any other colour

Dragonflies have incredible vision --- nearly their whole head is eye.

Snails can regenerate their eyes.

Iguanas have three eyes. A third eye sits on top of their head which only perceives brightness.

Cats have the largest eyes relative to their head size of any mammal.

The eye makes movements at a rate of 50 times every second

The human eye is so sensitive that, if the Earth were flat and it was a dark night, a candle’s flame could be seen from 30 miles away.

Honey bees have five eyes, two compound eyes that help them see around themselves, simultaneously, and three simple eyes that are positioned on the top of their heads that help with its orientation.

Eyes which are two different colors are the result of a condition called 'heterochromia'.

Chameleons can move their eyes in two directions at the same time

The human eye blinks over 4,200,000 times a year

The ostrich's eye is bigger than its brain

Our most active muscles are in our eye

People with dark eyes are apparently more agreeable, while people with blue eyes tend to be more competitive.

Humans have the ability to see ultraviolet light but it's passively filtered through the lens of the eye (which can be removed).