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Unlike retinal implants, which are being explored as means of artificially using light to stimulate the nerves leaving the retina, this particular device, known as the Moran | Cortivis Prosthesis, bypasses the eye and optic nerve completely and goes straight to the source of visual perception.

After undergoing neurosurgery to implant the device in Spain, Gomez spent the next six months going into the lab every day for four hours to undergo tests and training with the new prosthesis.

The first two months were largely spent getting Gomez to differentiate between the spontaneous pinpricks of light she still occasionally sees in her mind, and the spots of light that were induced by direct stimulation of her prosthesis.

Once she could do this, researchers could start presenting her with actual visual challenges.

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