The Reichert ClearChart 4 family of Digital Acuity Systems are the latest to the market. The ClearChart 4 is one of three different options and is a sleek modern looking all-in-one design. The Reichert ClearChart 4 is easy to use and is purpose built for acuity testing. The ClearChart 4 features a wide selection of optotypes and special testing charts. The Reichert ClearChart 4 is a high resolution monitor with an LED backlit display that is light and long lasting.