| Description | 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 | Farnsworth D15 test is used to separate medium and strong color defect vs normal. Farnsworth D15 come in plexiglas boxes which permit the patient to select the sequence of chips. Then the box is closed and the selections can be read thru the bottom | These color vision tests have been designed by Dr Hahn for the screening, classifying the type and estimating the grade of color deficiency. These plates are designed to measure Red, Green, Blue, Yellow. They provide classification of strong, medium | HRR/Amsler book combo with occluding glasses. | 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. |