The ornamental design for a spring-bridge for eyewear, as shown and described.
FIG. 1 is a perspective view of a spring-bridge for eyewear showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a right side elevational view thereof.
The broken lines showing the lenses and other structures of the eyewear throughout the drawing views are for illustrative purposes only and form no part of the claimed design.