The visual development in infancy is not perfect, so it is appropriate to let the children's eyes see farther. If the card is always placed near the child's eyes, it may cause the child to squint.
Du Man flashcard is a successful educational method developed by Dr. Green Du Man in the United States. It uses flash to quickly transmit information to babies to stimulate related neural pathways in children's brains. Through learning, children can quickly improve the following abilities: improving understanding and business situations, cultivating good learning ability, exercising super-perception ability, having unique creativity, activating brain cells, improving body imagination, fast calculation ability, fast memory ability, activating eye stem cells and cone cells, and so on.
"Flash card" is a visual stimulus card in a broad sense. It aims at establishing high-quality visual neural circuits in infants (0-3 years old), enhancing infants' imagination and logical thinking ability, strengthening infants' visual cognition, cultivating infants' visual discrimination, enhancing infants' visual attention and observation, and developing infants' stereoscopic vision and visual integration ability through rich external visual stimulation means.