San Francisco - based company devises cheap haptic devices to help visually communicate . ` ` Tacit '' has sensors which measure distances from 1 inch to 10 feet . So far , tests with the blind have been very positive , he says , and it 's attracting interest from educators , designers and researchers in the field . Rubber pads apply more pressure as a person gets closer to an object .
San Francisco - based company devises cheap haptic devices to help visually communicate . ` ` Tacit '' has sensors which measure distances from 1 inch to 10 feet . Rubber pads apply more pressure as a person gets closer to an object .