Posts Tagged ‘biology’

Amazing Optical Illusion Shows That Our Eyes Are Horrible Light Meters

Here’s a mind-bending video in which someone created the famous checker shadow illusion in real life. The optical illusion takes advantage of the way our brains process lighting and shadows.

As with many so-called illusions, this effect really demonstrates the success rather than the failure of the visual system. The visual system is not very good at being a physical light meter, but that is not its purpose. The important task is to break the image information down into meaningful components, and thereby perceive the nature of the objects in view. [#]

Interesting huh? Our eyes aren’t very good as a light meters, since they’re easily deceived by context.
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Do People Always See the Same Things When They Look At Colors?

Update: It looks like the video was taken down by the uploader. Sorry guys.


Color is simply how our brains respond to different wavelengths of light, and wavelengths outside the spectrum of visible light are invisible and colorless to us simply because our eyes can’t detect them. Since colors are created in our brains, what if we all see colors differently from one another? BBC created a fascinating program called “Do You See What I See?” that explores this question, and the findings are pretty startling.
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Light Sensitivity of the Human Eye

As the low-light capabilities of high-end (and even low-end) cameras rapidly improve, it’s easy to marvel at technology and forget how amazing our own eyes are, but here are some mind-boggling facts to consider: did you know that the human eye can detect as few as two photons entering the retina, and that, under ideal conditions, a healthy young adult can see a candle flame from 30 miles away? To see how mind-boggling that is, try using Google Maps to find a location 30-miles away from where you live.

According to neuroscientist Bradley Voytek, the reason we don’t utilize our full sensory potential is because we’re not paying enough attention to them — kinda makes you want to put down your camera and focus on staring at things, huh?

We are all inattentive superheroes (via Boing Boing)


Image credit: Eye by Furryscaly