This colorful image disappears completely if you keep staring at it

It's always fun to play a trick on your eyes. They're so easily fooled! Take this illusion, for example. It's an old favorite. If you stare at the image long enough, the colors in the picture start fading away and eventually disappear. The colorful blobs shrink like evaporating water puddles » 6/09/14 8:46pm 6/09/14 8:46pm

Woman has 'love' written with a blood vessel in her eye

She's got love in her eyes. Literally. A Redditor says that her mom has a blood vessel that spells love in her eye. Supposedly it's not some crazy wacky tattoo either, the blood vessel is just more pronounced than usual and shaped in a way that we would recognize. At least it doesn't say something awful! » 5/05/14 10:42pm 5/05/14 10:42pm

Looking at Orange Light Is Like Drinking a Cup of Coffee

Light is an incredibly powerful force. Sure, it helps us see and gives us fast internet, but medical researchers keep stumbling upon new positive side-effects. A team of Belgian scientists, for instance, just discovered how a ten minute blast of orange light increases brain activity related to cognition and alertness. » 3/11/14 10:20am 3/11/14 10:20am

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… » 12/31/13 6:00am 12/31/13 6:00am

Why Do These Trippy Reindeer Eyes Change Color With The Seasons?

Dogs and cats are adorable creatures by day, but under the cover of night their eyes seem to shine like demon spawn. That's the work of the light-reflecting tapetum lucidum, a layer of tissue that sits right behind the retina. As it turns out, that same tapetum lucidum just might be responsible for turning reindeer… » 12/24/13 7:30pm 12/24/13 7:30pm

What kind of sorcery illusion lets these two blocks be the same color?

One is dark, one is light. One is gray, one is white. These are obviously two different blocks with two different colors right? Wrong. The two blocks are the same color. Seriously, they're the same shade of gray. Just place your finger across the seam (where the blocks meet in the middle) to reveal the illusion. Just… » 12/07/13 12:11am 12/07/13 12:11am

New Drug Could Save Migraine Sufferers From Horrors of Bright Light

If you've ever had a migraine, you've probably experienced photophobia, the painful sensitivity to light that sends you scurrying, eyes closed, to the darkest dungeon you can find. In that moment, you're probably wishing for a way to (temporarily) unplug your eyeballs and put an end to the agony. Researchers at The… » 8/27/13 4:48pm 8/27/13 4:48pm