The George Young Threshold Test
 Catalogue Number: 2584 The George Young Threshold Test Category: Equipment Sub-Category: Visual Acuity, Contrast sensitivity tests Designer/inventor: George Young Year Of Publication/Manufacture: 1950's Time Period: 1940 to 1999 Place Of Publication/Manufacture: London, UK Publisher/Manufacturer: Raphael's Ltd Description Of Item: Spiral bound booklet with black leatherette cover and cardboard pages. Includes a foreword by Montague L Hine and a desciption of the use of the test. The test plates each show one round colour sample of black, red, green, blue or yellow of graded intensities. Owner's name on first page 'D G Odgers'. Size: 165mm W x 112mm H x 17mm D. Historical Significance: George Young first developed his threshold test in 1918. How Acquired: Donated by Dawn Odgers Date Acquired: April 2015 Condition: Very good, pages yellowed. Location: Archive room. West wall. Unit 3 Drawer 2 |