Pinckers A, Cruysberg J R
Doc Ophthalmol. 1986 Dec 30;64(1):19-22. doi: 10.1007/BF00166681.
Some practical tips are given. With the help of the caps of the FM 100 Hue test simpler tests can be made, such as a Panel D-15 test. If 16 additional grey caps are procured the light sensitivity can also be determined. The durability of a colour specimen is doubled if a ring is fitted into the cap.