Optical devices, enhancers and correctors; target trackers [optical]; target trackers [telescopic]; target seekers [optical]; target seekers [telescopic]; infrared filters; infrared optical apparatus; instruments containing eyepieces; optical glass; optical lens blanks; objectives [lenses] [optics]; target surveillance apparatus [optical]; target surveillance apparatus [telescopic]; optical apparatus and instruments; optical reflectors; optical phase shifters; optical filters; optical condensers; optical lenses; optical beam deflectors; optical glass filters; optical inspection apparatus for industrial use; pouches for optical apparatus; micrometer screws for optical instruments; filters for optical devices; plastic lenses; polarization filters; prisms [optics]; prisms for optical purposes; stereoscopes; side guards for eyeglasses; anti-reflective lenses; optical enhancers; binoculars; hunting binoculars; spotting scopes; cases adapted for binoculars; telescopes; night vision goggles; apparatus providing night vision; thermal imaging apparatus for night vision; image identifier night vision devices; digital optical transmission apparatus; digital signal processing apparatus; telescopic measures with a digital read out; optical connectors; optical scanners; optical finders; optical cables; thermal imaging apparatus [other than for medical use]; observation instruments; surveillance cameras; visual monitoring apparatus; remote monitoring apparatus