The Reichert CT 200 Tonometer is a medical device used to measure the pressure inside the eye. It is a specific model of tonometer manufactured by Reichert, a company that specializes in ophthalmic instruments. The CT 200 model is designed to be accurate and easy to use, making it a popular choice for eye doctors and clinics. It is commonly used to diagnose and monitor conditions such as glaucoma. Model 12590, used, clean, in good shape, no way to test. AS IS