10 ft: KCRHN (9 Line) Chart Rx Form With long-lasting LED lamps and

With long-lasting LED lamps and DuraShock technology

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

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

It's like getting two programs on one USB

10 ft: KCRHN (9 Line) Chart Rx Form With long-lasting LED lamps and(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.