The double set helps with the examination of children in particular.
The colours are arranged by the examiner in any order whatever.
The child is then asked to arrange the matching colours of the second set beside.
This is the laminated version of the Hardy Rand Rittler Test (4th edition). HRR colour test with 20 plates. This book includes 4 demonstration plates, 6 plates for Screening, 14 plates to diagnose color deficiency.
The HRR is available from stock and will be shipped within 24 hours.