Laser is an acronym for 'light amplification by stimulated emission of radiation'. Focus is Latin for fireplace. In 17th-century science, it was the physical place where you concentrated sunlight to make heat or sharp images. So 'focus' is about concentration and clarity, while a laser, at least on film, will burn a hole in James Bond's privates. But the light from a laser is coherent, which is more than can be said for this unhelpful contribution to the world's burgeoning bank of bullshit.
Judge a man by his questions, not by his answers - Voltaire