LEA SYMBOLS® Proportional Distance Chart800724
A LEA SYMBOLS® pediatric eye chart with proportionally spaced (logMAR) lines; line sizes range from 20/80 to 20/8 (6/24 to 6/2.4). This chart can be used in an illuminated ESV1018 cabinet or hung on the wall. Chart Set includes a response key and instructions along with the chart.
Dimensions: 10" x 18" (25.4 cm x 45.7 cm).
Testing distance: 20 feet/6 meters.