NHS doctor has explained why blue eyes are the result of "crazy physics" rather than actual blue pigment in the iris.Dr Karan Rajan made a TikTok video in which he described the mutation and why blue eyes seem to change colour in a different light.Talking towards the camera, he says: "If you have blue eyes you have got some crazy physics going on."The reason your eyes look blue is due to the same reason why the sky looks blue."The iris, the coloured donut which gives your eyes its colour, has a layer of cells called the Stroma."In blue eyes, the Stroma is translucent and contains zero pigments because of a gene mutation."When light hits it, it scatters all the wavelengths of light. "Blue is scattered the most because it's a shorter.
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