20 ft: COH (10 Line) Chart SC Appropriate for ages 6-12

Appropriate for ages 6-12

10-year manufacturer’s warranty

The Nickie anatomical training doll is great to use for training nurses

A child who isn't following the rules is a child who’s always in trouble

20 ft: COH (10 Line) Chart SC Appropriate for ages 6-12(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.