This is a very simple and interesting vision discrimination game, which includes two game categories and four game difficulties. Color block color recognition game is to identify different color blocks from many color blocks. With the different difficulty of the game and the improvement of the level, the color between the color blocks will be closer and closer. The relative difficulty of animal recognition game is slightly lower, but with the improvement of the difficulty, the matrix is larger and larger, the animal head image is smaller and smaller, and the difficulty is higher and higher. These two games can be used by users to test the color discrimination ability and