Refractor

FIG. 1 is a front right perspective view from above of a refractor according to the new design;

FIG. 2 is an enlarged front right perspective view from above thereof;

FIG. 3 is an enlarged rear left perspective view from below thereof;

FIG. 4 is an enlarged front elevational view thereof;

FIG. 5 is an enlarged right side elevational view thereof;

FIG. 6 is an enlarged left side elevational view thereof;

FIG. 7 is an enlarged rear elevational view thereof;

FIG. 8 is an enlarged top view thereof; and,

FIG. 9 is an enlarged bottom view thereof.

The broken lines in the drawings illustrate portions of the environment that form no part of the claimed design.