Use this small pocket card to quickly discover whether a child's or adult's visual acuity is within the normal range. Proportionally-spaced lines on one side and more tightly-spaced numbers on the other. Line sizes from 20/400 to 20/10 (6/120 to 6/3) equivalent. 3.75" x 6.25" (9.5 cm x 15.9 cm).
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