Danyang Xingda Optical Co. Ltd. was founded in 1988, is the largest domestic trial case lenses and audition rack ophthalmic instruments manufacturer. The company has passed the ISO9001 international quality system certification and ISO13485 medical equipment quality management system certification. Our main products are: full aperture bright metal ring, decreasing the size of plastic ring two series: trial case lenses and other specifications, accurate optometry, is your ideal professional optometric instrument.The company is committed to trial lens research, and brings domestic and foreign experts and optometrists optometry experience, constantly updated technology, increase the technology content of the test lenses, improve the optometry technology. Companies adhering to the "excellence" quality policy, to provide high quality products to our customers at home and abroad, the products are not only sold well in the domestic market, and has been exported to Europe, Africa, Southeast Asia, Middle East countries and other regions. By domestic and foreign merchants, ophthalmologists and optometrists trust.