Vintage Ophthalmic Visual Field Test Objects, Case with Wand, Sbisa Co, Italy

Description

These test objects fit perfectly on the wand and are used to measure peripheral vision in conjunction with a tangent screen.  The case closes securely and is lined on the bottom with velvet.  The top is lined with a brocade material.  They are unused and come from the stock of an optical company that was started in the late 1920's.  I cannot date them accurately.  I have three sets available and will adjust the shipping cost accordingly should anyone want more than one.