This set of flash cards was designed for testing distance visual acuity in children and adults who have difficulty with visual acuity charts, the LEA SYMBOLS®Crowded Symbol Book Test, or the LEA SYMBOLS® Single Symbol Book Test. Line sizes from 20/200 to 20/8 (6/60 to 6/2.4) equivalent, 0.10 to 2.50. Includes response key, training cards, and instructions. 30 cards per set, 4" x 5" (10 cm x 12.7 cm) to 5" x 5" (12.7 cm x 12.7 cm).

10 feet/3 meters testing distance

 

https://leatest.com/sites/default/files/pdf/252700_FlashCards.pdf