A COMPLETE SELECTION OF OPTICAL PRODUCTS Carton Optical (Siam) Co., Ltd. provides a complete selection of microscope and optical products, ranging from biological and stereo microscope, to binoculars and trinocular. These come with various types of stand and function. Magnifiters and optical accessories are also included in the company's long list of product categories. Some of the company's products are made fir the domestic market, while others are exported abroad to serve the requirements of a reputable range of overseas customers in the U.S.A.,Japan, Europe and in the Asian region.