How the 20/20 Vision Scale Works

How the 20/20 Vision Scale Works

With more than 150 million people in the United States (nearly half of the population) requiring some form of corrective eyewear to compensate for visual impairment, chances are you have had your eyesight graded on the 20/20 scale before. If you haven’t, you have probably heard other people saying they have "20/20 vision" or even the phrase "hindsight is 20/20." The vision scale is so prevalent in American culture that there’s even a TV news show named after it.

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If the Color Pink Doesn’t Scientifically Exist, Why Can We See It?

If the Color Pink Doesn't Scientifically Exist, Why Can We See It?

Absent from the visible spectrum and neither a wave nor a particle, the color pink is, for many, a scientific enigma: how can a shade that doesn’t even appear in the rainbow exist? The answer lies in color theory.

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These Smart Glasses Could Help the Blind to See

These Smart Glasses Could Help the Blind to See

These smart glasses could help bring sight to thousands of blind people, by converting visual information into images that can actually be seen by the visually impaired.

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Why Your Dumb Eyeballs Keep Falling for Optical Illusions

Optical illusions are fun because you literally can’t believe your eyes. But isn’t it a little troubling that your eyes can get fooled like that? Why don’t they show you the visual truth? How can you ever trust them if they don’t?

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Researchers Will Restore Damaged Depth Perception with Electronic Eyes

Our depth perception doesn’t work without two eyes. However an estimated 285 million people worldwide suffer from some form of visual impairment in at least one theirs. The loss of sight in just one eye also means the loss of one’s ability to accurately judge short distances. However, a team of researchers have devised an ingenious solution to restore binocular vision. More »

Neuroscientist Invents Technology to Cure Blind Mice (and Maybe Humans)

A neuroscientist from New York named Dr. Sheila Nirenberg apparently has made a medical breakthrough that allowed her to restore sight to blind mice. Now these mice can see how they run thanks to the nonsurgical procedure. The procedure involves something akin to Geordi La Forge’s visor. The process that restored vision to the blinded mice has the potential of being effective in humans as well.

blind mouse 1

The technique the neuroscientist came up with uses glasses that are embedded with a tiny video camera and a computer chip. Nirenberg envisions a day when blind humans will be able to wear Star Trek style visors and see the world around them. She believes that the system could be ready to test on humans within two years.

According to the scientist, blindness is often caused by diseases that damage certain parts of the retina that detect light and the neural circuitry that attaches the retina to the brain. The technique bypasses the damaged cells and sends encoded information directly to the brain. The breakthrough came when she was able to decipher the code of neural pulses that a mouse’s brain is able to turn into an image. The treatment for blindness in the mice included the prosthetic glasses and an injected gene therapy to activate ganglion cells that were still alive inside the mouse’s eye. The scientist says she has already figured out how to use the same process with a monkey retina, which is very similar to the human retina.

[via NY Daily News]


This Is What Google Glasses Could Have Been [Video]

Google’s glasses were a little bit of a let down for those of us who wanted a true head-up display. This video, however, depicts a fictional future where the head-up display powers all our digital lives—and it’s equal parts awesome and terrifying. More »

The Science of Sight, in Interactive Cartoon Form [Science]

Our eyes are wonderfully complex biological devices, which most of us take for granted. But do you know that our perception of detail varies massively across our field of view? Or understand why we can walk in the dark but not read? This interactive cartoon does a great job of explaining those complex ideas and more, very, very simply. More »