Special Features
With roller; radiating tangent lines; 15 degrees on concentric circles; for use in charting the central and paracentral fields of vision at a distance of one meter
Description
42.000 inches nominal overall length.
Overall Width
48.000 inches
Design Designation
Bjerrum
Material And Location
Felt, wool
Part Name Assigned By Controlling Agency
Screen tangent eye examining bjerrum reversible black cloth
