20 ft: COH (9 Line) Chart Unavailable allowing your patient to press

allowing your patient to press a button and become more involved in the screening process

This near vision card features calibrated Sloan optotypes in an ETDRS format

For each occurrence

34 Specula per Tube) For use with all diagnostic

20 ft: COH (9 Line) Chart Unavailable allowing your patient to press(9" x 14") Sloan optotype chart for vision testing at 20 feet. Features two smaller groups 20 25 to 20 12. 5 for repetitive eye testing. May be wall mounted or used with illuminated cabinets (66003, 66004, 66016, 66090). The Sloan optotypes were developed on the same basis as Snellen optotypes. Sloan optotypes do not use serifs however, but do use a logarithmic geometric progression.