Advertising; commercial business management; commercial administration; dissemination of advertising material (leaflets, prospectuses, printed matter, samples); business management and organization consultancy; computer file management; organization of exhibitions for commercial or advertising purposes; online advertising on a computer network; rental of advertising time on all communication means; publication of advertising texts; rental of advertising space; dissemination of advertisements; sales volume tracking for others (commercial business management) and sales promotion for others; presentation of goods on all communication media, for retail purposes; retail store sale and online retail sale of optical apparatus and instruments, spectacles (optical), sunglasses, magnifying glasses, optical lenses, eyewear, spectacle cases, contact lenses, cases for contact lenses, headphones, earphones, spectacle cords, spectacle chains, hearing aids, hearing aids (prostheses), audiology equipment, prosthetic hearing-correction equipment; organization of promotional operations with a view to customer loyalty; organization of exhibitions, for commercial or advertising purposes, of goods or services in the field of optics and hearing; the bringing together for the benefit of others (excluding the transport thereof) of optical goods and hearing aids; provision of information and advice to consumers regarding the selection of optical goods, optical articles and hearing aids, for sales purposes; presentation of optical goods, optical articles and hearing aids on all communication media in the framework of retail sale; on-line retail store services for optical goods, optical articles and hearing aids.;