Manufactures optical instruments & apparatus Ophthalmic eye test lenses or accessories, Ophthalmic lensometers, Ophthalmic perimeters, Ophthalmic photometers, Ophthalmic prisms, Ophthalmic retinoscopes, Ophthalmic slit lamps, Ophthalmic spectrophotometers, Ophthalmic specula, Ophthalmic tonometers or accessories