Blindness in many people is caused by diseased rod and cone cells that are responsible for turning light into electric signals.
You no longer need to be able to see to enjoy virtual reality. A walking cane that simulates the feeling of real objects is letting people who are blind explore digital simulations.
DANIEL KISH SEES more than you might expect, for a blind man. Like many individuals deprived of sight, he relies on his non-visual senses to navigate the world. But people tend to find Kish’s abilities rather remarkable.
FOR centuries, canes have served blind and partially sighted people well by giving them a means to negotiate the world around them. The only serious upgrade they have undergone dates back to 1921, when a Briton called James Biggs, who had recently lost his sight, painted his own cane white in order to make it easily visible and to alert others to the presence of someone unable to see nearby obstacles.