Same test as Farnsworth D-15 (#9358) except discs are enclosed in a sealed plastic box and arranged using a magnetic pen. Therefore the discs are kept clean and can not be lost. Kit includes magnetic pen, score sheet and cloth … Continued
A simple and accurate method to detect congenital color vision deficiency (red/green defects). 14 plates total. Numbers (11 plates) and winding lines (3 plates).