10 ft: KCRHN (9 Line) Chart Rx Form Useful for testing preliterate children

Useful for testing preliterate children from ages 3-5 years old

White - 12” x 12” (12 Washcloths per Package) These washcloths are great to keep in a school clinic

11 1/2"H x 4"W x 10 3/4"L

each occluder has a Patti Pics face and a place to write the child's name

The Li-ion battery provides 30 hours of continuous use when charged for 24 hours

10 ft: KCRHN (9 Line) Chart Rx Form Useful for testing preliterate children(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.