Features： 1、Different Training Methods: Vision training chart contains 20 sheets, a total of 40 kinds of charts, including 5 training methods, to meet your different needs. 2、Training Suggestion: The training includes 3 levels of fineness, from low to high. It is recommended to use low level for vision less than 0.3, transition from low to intermediate for vision 0.3 to 0.6, and intermediate transition for vision higher than 0.6 to advanced training. 3、2 Color Backgrounds: The main training background of the vision training card is black and white. When you feel tired, you can use red and green to soothe. 4、Waterproof: Each picture is covered with a film, which is durable and waterproof for cleaning. The card can be directly painted with watercolor brushes, and can be wiped off with a wet towel after painting. 5、Not Easy to Break: The vision training chart is made of high quality coated paper, which is of good quality, not easy to break when used, and can be used for a long time. Specification： Item Type: Vision Training Chart Material: Coated paper Single Size: Approx. 28.5 x 21cm / 11.2 x 8.3in Contents of Booklet: 01 to 10 graphic connection training diagrams 11 to 20 graphic tracing training maps 21 to 26 training charts for the Schutl grid 27 to 34 visual maze training maps 35 to 40 alphabet chinese characters connection training charts Package List： 20 x pcs Vision Training Charts( Total of 40 patterns) 2 x Pens