The visual acuity test in a kindergarten and the nursery school is neglected. We can relieve a child becoming amblyopia by early detection, early treatment if we carry out the near visual acuity test in kindergartens, nursery schools of the whole country and an infant medical checkup. The curative effect is big approximately low age. We think that children can finish the amblyopia training if we can detect amblyopia at 3 years old before compulsory education begins. And we think that children can start school life without a burden by the poor eyesight. We hope at the society where all children can enjoy compulsory education fairly. We must perform the visual acuity test of the infant. To that end, the enforcement of the visual acuity test that "is reliable" for "a short time" is necessary. We devised a picture book and the visual acuity test kit. An infant can easily answer it that he is usually used to Landolt ring in a picture book. We do not perform it as an exercise of the visual acuity tests and hope Landolt ring to fit it while being fun, and playing.