The present invention is directed toward eyeglasses and a method of manufacture thereof. The tuning and compensating circuits provide a reader magnetic response having maxima at the center carrier frequency and at the low sideband frequency for improved reception of return signals from the tag to the reader. The process can include introducing isobutanol into a dehydrationisomerization reactor and contacting the isobutanol with a catalyst at conditions effective to dehydrate and skeletal isomerase the isobutanol to make a mixture of n-butenes and iso-butene. A compensator compensates for the following associated with the transmitter and the particular beacon: bias delay, noise, and measurement error. Moreover, a through notch is formed in the grip under the bulge.