Colour Vision

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It’s a colourful world out there. Ever wonder how it all happens?

Many of you may remember sitting in science class, learning about “light wavelengths” and how they correspond with different colours. But do you know how these colours are actually processed inside the brain?

Light, upon entering your eye, is first processed by the retina in the back of your eyes. The retina is covered in millions of tiny photo-sensitive cells referred to as “cones” and rods”. “Cones” are the cells that process colour, and “Rods” are the cells that process a sortof “black and white” image by ignoring colour wavelengths and instead responding to the lightness or darkness of light they are receiving. If you take a look at the included diagram, you’ll notice that cones are focused on the centre of your vision, while rods tend to hand around the edges. This is why your peripheral vision is less sharp and colourful.

Together, this setup of colour and light responding cells give us razor sharp vision, even if your wear glasses. If the human eye were a camera, we’d clock in at around 480 Megapixel lens (Kinda puts that new iPhone camera to shame, eh?). Although the clarity of your vision can be distorted based on your eye’s lens shape, the actual “resolution” of your vision remains the same. You can learn more about that here.

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Colour Vision Ultima modificare: 2015-08-03T14:10:13-04:00 de către karen

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