Product Name: 10 grid children string beads suit

storage box size: 13*6.8 * 2.3cm

each box delivers 2 m filament, novice beginner!                                                                                             

 Due to the development of children's eyeballs, optic nerve cells in the central fovea of fundus macula are not stimulated by enough clear images, which affects its development, thus losing the ability to distinguish fine space, cause visual disorder, thus forming amblyopia. Amblyopia children's fine eyesight training is to consciously force amblyopia eyes to focus on a certain fine and small target, so that the inhibited photoreceptor cells in amblyopia eyes are stimulated and their contact is inhibited, thus improving vision.