Model: OPTEC900

Special Features:

Farnsworth; cast or plastic housing; c/o: carrying handle, aperture assembly, manual or electronic means of color selection, colored filters, neutral density filters, source of illumination, spare lamp, carrying case, metal or plastic plate with instructions for operation; supplied with two plastic covered templates, a scoring template and instructions for examinee template; presents a series of nine pairs of red, white, green colored lights that must be identified by the examinee; vertical pairs of colored filters are permanent and reproducible; locus and tolerance for each three filters given in the ici accordinate system; illumination source: ge airport marker, 120 volt, 40 watt

Properties:

A device consisting of a lampholder, a set of color standards and an intergal handle. It may contain a battery container. It is designed to provide illuminated colored areas to test color vision. It is not designed for illumination of external objects. For items which provide general illumination, see lantern, electric.