of the touch pad are possible and switch types besides touch pads can be used as would be understood by one of skill in the art in view of this description similar to the first embodiment manual switch 720 in the present example is enclosed within earpiece 504 to the extent that it is effectively not noticeable that earpiece 504 contains a switching mechanism within it except for the presence of the touch pad of switch 720 which protrudes slightly from earpiece 504 and may be made visible on the surface of earpiece 504 in one example the presence of switch 720 causes the rear circular portion housing battery compartment 514 of earpiece 504 to have a thickness t 1 of approximately 15 mm as compared to a thickness t 0 of approximately 9 mm which in one example the rear circular portion of earpiece 504 would have without switch 720 further in this example the presence of switch 720 causes the rear circular portion of earpiece 504 to have a diameter d 1 of approximately 23 mm as compared to a diameter d 0 of approximately 18 mm which in one example the rear circular portion of earpiece 504 would have without switch 720 thus as in the first embodiment the third embodiment does not use a protruding structure for housing the switching mechanism again as in the first embodiment the switch arrangement of the third embodiment as illustrated in fig7 a and 7b unobtrusively blends in with and aesthetically enhances the pre existing contours of the eyeglasses these example aspects of the invention are discussed further below the exemplary embodiments discussed above provide numerous advantages the use of leds and batteries in the example arrangements described herein contribute to.