for many years, anyone administering the Farnsworth 100 Hue Tests complained about how patients could touch the colored discs; further, the discs are very easy to lose, resulting with test kits becoming compromised - this model of Color Test solves this problem: the 93 discs have been magnetized and encapsulated in a sealed clear plastic box, the patient selects the discs using a magnetic pen to move them into a scoring area and complete - scoring is easily accomplished by reading the scores through the bottom of the box