We See Everything Upside-Down Fact
The lens of each eye casts an upside-down image onto the retina. Then your brain takes these two upside-down images at slightly different perspectives (one per eye) and creates a single right-side-up image.
Eyesight
Eyesight is a person’s ability to see.
Factoids tagged with "Eyesight"
The Hubble Telescope Uses Real Colors Fact
The Hubble Space Telescope images use real colors in the sense that their color palette correlates with the wavelengths of observed light.
Reading in Dim Light is Bad For Your Eyes Myth
Reading in dim light isn’t bad for your eyes. Be it a book or electronic device, reading in dim light will not damage the eyesight of a healthy adult (although it may cause temporary strain).
Squinting Helps Vision Fact
Squinting helps to improve vision, at least temporarily, by allowing less light into the retina allowing us to focus our eyesight more easily.
Carrots Improve Your Vision Fact
Carrots can improve your vision if your body is deficient in vitamin A, but the popularity of carrots has more to do with a food shortage during WWII than beta-carotene.
You are Always Looking at Your Nose Fact
Your nose is in your field of vision, so you are always looking at your nose. Luckily, our brains filter out sensory information we don’t need.
Benjamin Franklin Invented Bifocals Fact
Benjamin Franklin is credited with inventing bifocals, although evidence suggests he may have been simply an early adopter of the split-bifocal lens.
Crossing Your Eyes Can Make You Permanently Cross Eyed Myth
Crossing your eyes can’t make you permanently cross eyed; the muscles holding the eye will fatigue and the eye will return to it’s original position.