The FORM Smart Swim 2 swim goggles show time, distance, and pace in the lens, so triathletes and lap swimmers check their numbers without stopping at the wall. Stroke and rest detection runs on its own, which keeps every length counted with no button to press. Swimmers choose which figures appear, and the display wears over either eye with prescriptions up to -3 still readable. What Our Gearhead(R) Experts Are Saying:"My heart rate shows in the lens through a hard set, with no chest strap and no glance at a watch. Between intervals I wait for the number to settle into the zone I want before I push off the wall again."