What levels of precision can be reached by robot-assisted surgery? What is the size range of the eye of a fly? Is #1 considerably larger than the range of #2?
Eye surgery
Researchers at BYU have been developing smaller surgical instruments to improve medical procedures. BYU researchers  created robotically-controlled forceps that can pass through a hole about 3 millimeters in size. The eye of a fly is considerably small and estimates range from .5mm to 2mm.
medical specialty
Would Eye surgery on a fly be in vain?