Features： 1、Matte Film: The vision test card adopts a matte film, which is non reflective and has a long life. It can be used for a long time and is not easy to break. 2、Rich Content: The vision card contains numbers, letters, simple graphics, etc. The card is highly recognizable and can be used to measure vision. 3、Double Sided: The vision card is double sided, with content printed on both sides, which not only saves paper, but is also very convenient to use. 4、Multi Scene Use: In addition to being used at home, the vision card can also be used for vision tests, schools, hospitals, enterprises, etc. 5、Improve Vision: Our vision card can be used with double sided mirrors for vision training, according to the current situation for training to improve vision. Specification： Item Type: Vision Test Card Material: Paper Size: Approx. 21 x 14cm / 8.3 x 5.5in Description of Products: Front: 20/30 E character card, 20/30 single character card, 20/30 three character card, 20/30 five character card, 20/40 graphics card Reverse: 20/40 E character card, 20/40 single character card, 20/40 three character card, 20/50 single character card, 20/50E character card Single Character Card: A single letter E Signal Card: E in different directions Three Character Card: 3 Numbers or 3 letters Five Character Card: 5 Numbers or 5 letters Graphical Vision Card: Simple Graphics Package List： 5 x Vision Test Cards