Blind entrepreneur Fernando Albertorio can sense objects like people, doorways, trash cans, and lamp posts well before he touches them with his newly invented super watch. Albertorio cofounded Sunu to market the device he and two cofounders developed. The company is a participant in Y Combinator’s startup accelerator. The watch uses a solar sensor and sensitizing vibrations to alert the wearer to his surroundings by emitting a high-frequency ultrasound wave that bounces off of the objects he encounters. The sensor measures the strength of this reflection and produces a vibration that’s stronger or weaker depending on how close or far away the object is. Hmm. Maybe pedestrians who like texting as they walk or cross the street would like to have one of these.