Isolating Masks for Illuminated Cabinets600076
These masks are used when an eye chart is installed in an illuminated cabinet. The patient holds the mask horizontally in front of the chart to isolate an individual symbol or letter.
The mask with the 1.25" square hole is used to isolate larger objects 20/100 etc. The mask with the 1" square hole is used to isolate smaller objects 20/50 etc.