The interchange of theoptical fiberguidelight needle andthe needle coreof a retainable needle are not neededwhen in use, and the bloodeffluxbecause ofinexperiencedoperationcan beavoided.
Last month, in conjunction with Shawn-Yu Lin of the Sandia National Laboratories in New Mexico, the group showed that photonic crystals can guidelight on a far smaller scale than was previously possible.
Amazon's lightguide technology precisely diffuses the light across the screen and only requires four LEDs to light the entire screen (unlike LCD screens which can use up to 50 LEDs).