Pediatric eye chart featuring LEA SYMBOLS® for screening or testing individuals beginning at age 2 1/2. This eye chart folds in half for added mobility or easy storage. Front side of eye chart features pediatric symbols in proportionally-spaced lines (ETDRS format) for monocular vision testing. The opposite side, pediatric symbols are in Massachusetts Visual Acuity Format for both left eye and right eye testing.
Proportionally-spaced lines; line sizes range from 20/200 to 20/16 (6/60 to 6/4.8) equivalent. The 20/160 (6/48) and 20/100 (6/30) lines have been omitted. 50% spaced rectangle (Massachusetts Visual Acuity Test format) with line sizes from 20/80 to 20/16 (6/24 to 6/4.8) equivalent. Has a hole for hanging the chart on the wall. Includes response key, flash cards, and instructions. 16" x 16" (40.6 cm x 40.6 cm). Folds to 16" x 8" (40.6 cm x 20.3 cm).
Notations include actual letter size for 10 foot and 3 meter measurements which are found on left side of the chart. Equivalent letter sizes notations include 20 foot, 6 meter, decimal and Log MAR measurements which are found on right side of the chart.
10 feet, 3 meters testing distance
Przykładowe przeprowadzenie badania :
Przelicznik skali Decimal/Snellen
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