Shanghai Best Optical Instrument Co., Ltd. has been focusing on the optical/optometry/ophthalmic equipments since 2011 in Shanghai, China. We are committed to offer quality optical instruments and service at competitive price, we also provide good warranties on our products. Our main products include auto refractometer, auto lens meter, slit lamp, auto chart projector, phoropter, lab equipments etc. Our products get CE, ISO and FDA approved. Welcome to choose us to work with you by win-win cooperation.