<ul><li>A new retinal stimulation technique called Oz enabled volunteers to see colours that lie beyond the natural range of human vision.</li><li>Oz works by stimulating individual cone cells in the retina with targeted microdoses of laser light, compensating for the eye's motion.</li><li>Rather than being based on spectral distribution, colour perception is controlled by shaping the spatial distribution of light on the retina.</li><li>The technique could potentially help individuals with colour blindness to experience full colour vision.</li></ul>

Retinal stimulation reveals colour never before seen by the human eye

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