Use these small pocket cards to quickly determine whether a child's visual acuity is within the normal range.LEA Symbols Card Proportionally-spaced lines on one side and 50% spaced rectangle (Massachusetts Visual Acuity Test format) on the opposite side. 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).
LEA Numbers Card The test has proportionally-spaced (LogMAR) lines on one side and tightly crowded lines (50% spacing) on the reverse side Line sizes from 20/400 to 20/10 (6/120 to 6/3) equivalent, 0.05 to 2.00. 3.75" x 6.25" (9.5 cm x 15.9 cm).Both are 16 inches, 40 cm testing distance
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