A set of 22 acrylic prisms in a compact polymer case with carrying handle. The box opens flat and fits in a drawer.
All prisms are made using Clear Prism® Technology.
Dimensions: 8-7/8" x 8" x 2"
The Worth Four Dot Test helps evaluate color perception by stimulating the red, green and blue cone receptors in the retina. The test set consists of a high-quality, chrome flashlight with a pair of universal spectacles together with complete instructions. The flashlights in the test sets require 2 D-cell batteries, which are not included.