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Light-responsive dye stimulates sight in genetically blind patients March 11, 2015

Toshihiko Matsuo
Graduate School of Medicine, Dentistry and Pharmaceutical Sciences

Behaviour test to establish the presence of sight in Royal College of Surgeons rats with retinal prosthesis implantation. The researchers rotated a drum with black-and-white vertical stripes either clockwise or anticlockwise at a slow speed of 2 or 4 rpm. A rat that had prosthetic retinal implants was put in a round transparent-walled cage inside the drum. Instances when the rat turned its head in a direction consistent with the direction of drum rotation were counted as indications that the rat had retrieved some level of sight.

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