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 .
San Francisco-based inventor devises cheap haptic device to help visually impaired . `` Tacit '' uses sensors which measure distances from one inch to 10 feet . Rubber pads apply more pressure as a user gets closer to an object .