Lasers for scientific use; Lasers, not for medical purposes; Optical apparatus and instruments; Light conducting filaments (optical fibers (fibres); Optical fibers (fibres) (light conducting filaments); Elastic wave meters; Optical communications instruments; Optical communication apparatus; Optical glasses; Goggles; Fibre optics

Medical apparatus and instruments; Lamps for medical purposes; Medical instruments; Medical lasers; Medical masks; Dental apparatus and instruments; Diagnostic instruments for ophthalmology