Jobst Ultrasheer 15-20 Small Knee-Hi Natural Beige (Pair) Aprons-Bibs Accepted by leading authorities as

Accepted by leading authorities as a simple and accurate method for discovering congenital color blindness and red-green blindness each in two forms complete and incomplete * Includes four special plates for tests to determine the kind and degree of defect in color vision * Makes use of the peculiarity that in red-green blindness blue and yellow appear remarkably bright compared with red and green * Color plates encased in specially designed album-type books for ease of handling * Detailed instructions included

* Optional armrests attach easily

Large/X-Large 12+ Excellent Retail Packaging

Main unit Color: white

Single Channel * Continuous operation or work/rest prompts * LED visual display * Hand-held portability * Carry Case * Convenient 9 volt battery with LED battery check * Easy to operate * Goal types include: Above Tone Below Tone Matrixed Audio Tone and A/B Ratio for Dual Channel Systems *

Jobst Ultrasheer 15-20 Small Knee-Hi Natural Beige (Pair) Aprons-Bibs Accepted by leading authorities asKnee Hi * Natural * 15 20 mmHg * Small * Ankle Circ 7 8. 25 Calf Circumference 11 15 * Beautifully sheer hosiery Durable long lasting *Sandalfoot styling *