Mark the circle at five equidistant points. Insert eye screws at the circle's center and at all five points. 3.) Cut Pythagoras. Cut five pieces of tubing to the lengths in the table below and deburr.

Plotting a large set of equidistant points on a flat surface doesn't take a mathematician: Any draftsman can do it. Throw in a curve or two, however, and the problem gets much tougher.

Amar Agarwal The device is a square-shaped temporary implant with four circular loops that hold the iris at equidistant points (Figures 1 and 2). It has a one-piece design .