Specifically formulated for the control of cross-contamination

double-sided tape (included)

Rest around your neck for hands-free use or coil on a table to use in free standing position

from foreign components

Fun and easy way for children to hold their lost teeth until they get home

10 ft: KCRHN (9 Line) Chart SC Specifically formulated for the control(9" x 14") Sloan optotype chart for vision testing at 10 feet. Features two smaller groups 10 25 to 20 8 for repetitive eyesight testing (20 50 to 20 16 equivalent). 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.