Opti-München and Optica in Cologne are adding more side events to help attract more visitors at their respective fairs early next year. The Munich fair will host at its Jan. 11-13 session historical 18th and 19th century eyeglass models from the Brillenmuseum of Hamburg as well as more than 100 Chinese frames and eyeglass cases. Assindustria Belluno will sponsor a collective exhibition of small Italian firms at the fair. Optica, which is planned for Feb. 15-18, is inviting up to 12 German exhibitors to present the characteristic features of their own designs in the Auenplatz entrance area of the fair.