Color Vision Teaching Guide and Screener
Provides 5 Ishihara type screens plus information on the anatomy, genetics, occupational affects and physics of color deficiency. Laminated for longer life.
Describes the role of Rods and Cones, Color on the job and "one in twelve" genetic explanation.
Use at 30" (75cm) Size: 8 1/2" by 11" (21 cm x 29 cm).