If you’ve always wanted to learn more about laser eye surgery, check out this interesting “How it’s Made” segment. Video after the break.
Currently manufactured excimer lasers use an eye tracking system that follows the patient’s eye position up to 4,000 times per second, redirecting laser pulses for precise placement within the treatment zone. The energy of each pulse is usually in the milliwatt range. Typically, each pulse is on the order of 10–20 nanoseconds