Both manual and automatic units feature operator to patient communication (talkover) which is built in

but kid friendly

5/8" x 2¼"

These drops provide many of the same healthy qualities as natural tears

The poly/tissue material provides both comfort and moisture resistance

10 ft: SZN (11 Line) Chart SC Both manual and automatic units(9" x 14") Sloan optotype chart for vision testing at 10 feet. Features two smaller groups 10 20 to 10 8 for repetitive eyesight testing (20 40 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.