Manufactures Optical Instruments/Lenses Viewing stands for vision acuity testing, Ophthalmic child fixation bars, Ophthalmic diagnostic exam products, Eye charts or vision cards, Corneal topographers, Exophthalmometers, Keratoscopes, Ophthalmic colorimeters, Ophthalmic distometers, Ophthalmic drums or its accessories, Ophthalmic euthyscopes, Ophthalmic eye test lenses or accessories