Rectangular eyeglasses
Remote control for an optical system
Removable sunshade for glasses
Resilient clip for retaining removable lenses in an eyeglass fra
Retainer for eye glasses
Retainer for eyeglasses
Retainer for eyeglasses
Retainer for eyeglasses
Reticle and graticule
Reticle for a gemstone microscope
Retinal camera
Retractable lighted keyring magnifier
Reverse microscope
Rifle scope with zoom
Riflescope
Riflescope
Riflescope
Riflescope
Riflescope cover
Riflescope ocular housing and power adjustment ring