The Neutral Density Filter Bar 53010

The Neutral Density Filter Bar allows to easily measure afferent pupillary defects (APD) also called “diminished pupil reaction to light levels”. Provides the filter values: 0.3, 0.6, 0.9, 1.2, 1.5, 1.8 Density Log Units. Each filter is 1.5" (38 mm) square with an overall bar size of 10" by 1.5" (25.3 cm by 3.8 cm). Comes with a handle for easy use and a case for storage.

#470200 is 10" by 1.5" (25.3 cm by 3.8 cm) with a handle.

#151170 is 10" by 2" (25.4 cm by 5.0 cm) no handle.