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66 cm Intermediate Distance Charts
Charts calibrated to test visual acuity at an
intermediate distance of 31″ (80 cm) or 26″
(66 cm). Charts are available in 3 scrambled
versions for repetitive testing situations.
Sloan Letters optotypes with proportionally
spaced lines; line sizes range from 20/400 to
20/10 (6/120 to 6/3) equivalent. Notations for
Letter Size, Decimal, and logMAR are also
on the chart. Chart fits in Quantum Series,
Model A+, and Model A illuminated cabinets.
Chart size is 9″ x 14″ (22.9 cm x 35.6 cm).
31″ (80 cm) testing distance.