Hardy Rand Rittler Test (HRR)

The Hardy Rand Rittler (HRR Test) Pseudoisochromatic Plates provides several very important features to provide the most advanced color vision test available: congenital and acquired testing, identification of the type of defect and diagnosis of the extent of the defect as well as quick positive classification of normals. The Hardy Rand Rittler Pseudoisochromatic Plates employ a sophisticated test strategy that virtually eliminates the potential for memorization and malingering. The figures used by the plates are independent of language and suitable for both adults and children.

This is the laminated version of the HRR test with 20 plates. This book includes 4 demonstration plates, 6 plates for Screening, 14 plates to diagnose color deficiency.

Special nonglare laminate has been tested using a spectrometer to insure the colors are unchanged. Helps avoid fingerprints and damage to the plates.

HRR Standard Pseudoisochromatic Test

Extensive clinical trials employing almost 100 normals and 125 color defectives testify to Hardy Rand Rittler efficiency. EASY TO ADMINISTER The HRR Pseudoisochromatic Plate Test supports very efficient color deficiency screening. The first four plates are used to show the patient how the test works. The fourth plate in this demonstration series has no figure and serves to potentially uncover attempts to memorize this test. The next six plates (screening series) present the most difficult protan, deutan and tritan (red, green, yellow, and blue) targets. Success with these plates defines the subject as having normal color vision 1 and completes the test. The subsequent 14 plates are the diagnostic series and provide diagnostic as to the extent (mild, medium or strong) and type of defect (Protan, Deutan, Tritan).