. Nanorobots work at a level a thousand times more precise than the sharpest scalpel. By working on such a small scale these particles of intention can be used to change one'sphysical appearance. If nano particles are  programmed correctly they can be used  to  rearranging your atoms...and also "fill in or subtract"in this manner and change  the shape of your ears, nose, eye color or any other physical feature you wish to alter....