Vision Facts

If you keep a goldfish in the dark, it will eventually turn white

Tigers can see 6 times better at night than humans.

Studies show that men tend to have slightly better visual acuity than women, while women generally have more sensitive hearing, particularly at higher frequencies.

The octopus does not have a blind spot.

Poor eyesight (myopia) is associated with higher IQ.

Women blink nearly twice as much as men.

Newborns can barely see color when they're born, seeing mostly in black, white, and shades of gray, but they develop full color vision by about 5 months old.

While 7 men in 100 have some form of color blindness, only 1 woman in 1,000 suffers from it.

Cows can easily walk up stairs, but find it incredibly difficult and generally avoid walking down them due to their anatomy and poor depth perception.

One quarter of the human brain is used to control the eyes.

The lense of the eye continues to grow throughout a person's life.

If it isn't moving a frog can't see it. If the frog can't see it, he won't eat it.

An ostrich's eye is bigger than its brain.

Greyhounds have the best eyesight of any breed of dog.

You see your nose at all times, your brain just chooses to ignore it.

If the human eye were a digital camera, it would have approximately 576 megapixels—though our eyes work so differently from cameras that any comparison is a rough estimate.

When you look up at the blue sky and see white dots flying around, you’re actually seeing your own white blood cells.

There's a woman named Veronica Seider who had vision 20x better than average. She could identify people more than a mile (1.6km) away.

Craniopagus conjoined twins Krista and Tatiana can see through each other’s eyes.

Special glasses exist that can enhance color perception for some people with red-green color blindness, allowing them to distinguish colors they couldn't before—though the effect varies by individual and doesn't fully replicate normal vision.

Reindeer are among the few mammals that can see ultraviolet light, an adaptation that helps them survive in the Arctic.

All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.

Those things you see floating in your eyes when you stare into space are called Mouches Volantes, French for 'flying flies,' though they're more commonly known as floaters.

A blind American man taught himself to navigate using echolocation. His hobbies include hiking and mountain-biking, and he has now trained over 500 students in his ‘tongue-click’ technique.