We claim the ornamental design for a signaling device for eyeglasses, as shown and described.
FIG. 1 is an isometric view of an embodiment the claimed design;
FIG. 2 is a top view of the claimed design shown in FIG. 1;
FIG. 3 is a bottom view of the claimed design shown in FIG. 1;
FIG. 4 is a front view of the claimed design shown in FIG. 1;
FIG. 5 is a rear view of the claimed design shown in FIG. 1;
FIG. 6 is a right side view of the claimed design shown in FIG. 1;
FIG. 7 is left side view of the claimed design shown in FIG. 1; and,
FIG. 8 is a perspective view thereof.
The broken line showing of an eyeglass frame arm is included for the purpose of illustrating portions of the “article” and forms no part of the claimed design.