4th edition. The HRR (Hardy, Rand and Rittler) plates provide testing for congenital and acquired color vision defects (blue-yellow and red-green defects). 4 demonstration plates, 20 test plates, instruction card and a laminated score card to make copies.
Laminated combination HRR/Amsler book for testing of acquired Color Vision, defects is now easier than ever with two of the key tests combined in one book. The new HRR 4th edition is combined with a book of Amsler Charts, including … Continued
The Farnsworth D-15 style Color Vision, test quickly and easily screens for red-green color deficiencies by asking subjects to separate 15 color disks. The Farnsworth D-15 allows basic color deficiency screening.