The magnets are solid cylinders with {HEAD ~ a large central hole} mounted on {TAIL ~ intact or perforated eyeglass lenses}; or thin flexible disks with either a large central hole or a plurality of small holes mounted directly on the eyeglass rims in place of lenses 
The magnets are solid cylinders with { HEAD ~ a large central hole } mounted on { TAIL ~ intact or perforated eyeglass lenses } ; or thin flexible disks with either a large central hole or a plurality of small holes mounted directly on the eyeglass rims in place of lenses
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH