B) Background: Landolt Cs and letters are commonly used optotypes. In the explorative study we compare four different ways of applying them: The Freiburg visual acuity test (FrACT) using a keypad and a haptic Landolt device, a Landolt C chart in accordance to ISO 8596 and DIN 58220 with eight-orientated Landolt C and ETDRS charts. The aims of the survey were to determine examinee´s/examiner´s subjective ratings using Visual analogue scales (VAS), the inter-test agreement between the tests and test-retest reliability of the tests, concerning the test duration.