Notations for testing at 4 meters (13 ft.)
Acuity range 40M to 2M (20/200, 6/60 to 20/10, 6/3 equiv.)
Measures 62 X 65 cm (24.5 X 25.5 in.)
Fits ETDRS Illuminator Cabinet CAT. NO. 2425
Can be wall-mounted
Developed in 1976, Tumbling "E" charts were intended for testing illiterate patients and those not familiar with the Roman Alphabet. The Tumbling "E" vision tests are considered highly useful for testing foveal vision and has a high visual acuity threshold. The construction of the letter "E" is similar and gives the effect of gratings. The Tumbling "E" chart is also useful for detecting signs of Astigmatism.
IS
