FIG. 1 is a top perspective view of a lens for a magnifier showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a first end elevational view of the top plan view of FIG. 2;

FIG. 5 is an opposite end elevational view of the bottom view of FIG. 3;

FIG. 6 is a left side elevational view of the bottom view of FIG. 3;

FIG. 7 is a left side elevational view of the top perspective view of FIG. 1; and,

FIG. 8 is a bottom perspective view thereof, the undisclosed portion is not part of the claimed design.

The dotted lines are intended to show features that are environmental only and form no part of the claimed design.