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These playing cards are specially designed to make it easy to measure near visual acuity in young children while teaching concepts of similar/different, big/small, bigger/smaller. The four packs contain 16 cards each with symbols of varying sizes: 16M and 10M, 6.3M and 4M, 2.5M and 1.6M, and 1M and 0.63M. Flashcards and instructions are included.
Dimensions: 1.6″ x 2.75″ (4 cm x 7 cm).
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