The Panel 16 Color Vision Test includes 16 test caps and 17 restriction
rings with one of the caps being a “pilot”. The diameter of the stimulus
area is 1.3" (3.3 cm), and can be reduced by using dark gray
restriction rings with an opening of 0.47" (1.2 cm) in diameter.Acrylic
case includes a cloth storage pouch. Travel tube comes with black cloth.
Comes with recording forms and instructions.