| Description | 70 discs to investigate acquired color deficiency. Quantifies neutral zone characteristics of dyschromatopsia and evaluates the relative luminance. | This kit consists of a ‘Matching Card’, three HRR symbol cards and instructions. Kit is intended to help prepare a child for subsequent HRR 4th Edition color testing. There are several ways to use the test. For the youngest patients, the parents can | 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. | 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. | 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 |