Mars letter contrast charts (set of 3), with letters

The contrast sensitivity test set MARS is ideal for a quick and thorough test of the contrast vision. The output are logCS values between 0 and 2,0. With all 3 charts with letters you can test monocularily (R+L) and binocularily. Testing distance: 40cm. Standardized test, ideal for vision tests of the German FeV from July 1st 2011 (according to the official DOG announcement from June 2010). Comes with manual for FeV criteria. Set includes: 3 contrast charts, manual, and black plastic box for storage. Each chart is put in a transparent cover for safe storage. Dimensions of 1 chart: 23 x 36 x 0,5cm. Also available with numbers: See item no. 82018.