Can be wall-mounted.
Tumbling E charts, also referred to as Illiterate E tests, are useful for testing patients that are illiterate or mute. Patients simply have to sign or gesture which direction they see the E facing. Tumbling E charts are considered highly reliable and are second only to Landolt C tests. Both tests use only one optotype positioned differently and are useful for testing several types of patients.
Looking for scrambled version?