Steve Austin had that enviable telescopic squint. Star Trek chief engineer Geordi La Forge saw darkness as daylight with his 24th-century ocular implants. And now it looks like a generation of very real people who have lost their sight are next in line for such seemingly sci-fi vision. “I’m hesitant to use the word ’superpower,’ ” says Armand R. Tanguay, Jr., an electrical-engineering professor at the University of Southern California who is building the world’s first implantable camera for the blind.