The CP-40 is a new product that uses Log MAR charts so users can take in more test charts as needed. This can be used to project charts with three horizontal and five vertical lines or two horizontal and four vertical lines. There are masks available for individual characters or lines but you can also make the design totally open. Visual acuity values can also be seen in a test frame. Charts can also be changed with buttons or a controller. All charts are sealed properly and can be replaced as needed. The unit's angle can also be adjusted based on the needs that the user may have.