| Description | HRR 4th edition pseudoisochromatic test from Richmond Products includes the four demonstration plates, the six screener plates and the 14 diagnostic series for a total of 24 plates. Each of these plates has its own tab for easy and clean page | Accepted by leading authorities as a simple and accurate method for discovering congenital color blindness of two type total color blindness and red/green blindness. This book is used for children and the illiterate. | 70 discs to investigate acquired color deficiency. Quantifies neutral zone characteristics of dyschromatopsia and evaluates the relative luminance. | New saturated disc test for detecting and grading acquired color deficiency. Requires only two minutes for quantitative estimation of saturation thresholds for bluish pigment colors. Highly sensitive to and specific for differences between normal and | Spanish HRR/Amsler combination with Spanish and English directions for both HRR and amsler tests plus occluding glasses. |