All visual acuity tests are included in one product. All optotypes are randomized to avoid memorization. Acuity charts are single and multi line and can utilize fixed optotypes sets that you choose. There are special optotypes for kids as well as patients that are not English speaking and who are mentally challenged to improve the accuracy of acuity testing. The interface is efficient that makes it easier to test. Each chart has quick keys so that it is easy to use. Also, there is no need to utilize a mouse after set up. The software runs on Macintosh, Linux, and Windows PCs. We likewise have hardware options for all your acuity testing requirements. It controls acuity tests and features via a remote control, mouse, and keyboard.