the test consists of 24 pseudoisochromatic tables for protan (weak red), deutan (weak green), and tritan (weak blue/yellow) - this test is indicated for both adults and children - is approved and used by the U.S. Navy, Army, Marines and Coast Guard and uses proven confusion colors based on CIE Color Space
• Rapid screening takes two minutes to determine common colour vision deficiencies.
• The first section for adults has 17 tables with numbers + 1 demonstration table
• The second part for children or illiterates consists of 7 geometric figures + 1 demonstration table
In addition there is also a grid of Amsler - designed by Dr. Terrace Waggoner