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Snellen Letter Linear-Spaced Distance Chart, 6m/20ft
Product only available to medical professionals.
Linear-spaced lines; line sizes range from 20/100 to 20/16. Lines are labeled with 20 ft notations only. This chart can either be wall mounted or used in an illuminated cabinet. Chart size is 9 in x 14 in (22.9 cm x 35.6 cm).
20 feet, 6 meters testing distance.
