The ornamental design for eyeglass frame, as shown and described.
FIG. 1 is a perspective view of an eyeglass frame showing my new design;
FIG. 2 is a front side elevational view thereof;
FIG. 3 is a rear side elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a perspective view showing the eyeglass frame in condition of use with an eyeglass strap, the broken line showing of eyeglass strap is for illustrative purposes only and forms no part of the claimed design.