Test chart Snellen rating (Folding portable Snellen visual acuity chart)
 Catalogue Number: 2583 Test chart Snellen rating (Folding portable Snellen visual acuity chart) Category: Equipment Sub-Category: Visual Acuity, Contrast sensitivity tests Year Of Publication/Manufacture: c 1950 Time Period: 1940 to 1999 Description Of Item: Folding Snellen test chart, 500 x 330 mm, with astigmatic fan with rotating block axis locator. The Snellen letters are all symmetrical which enables the chart to be used by direct viewing or through a mirror. The distance units are in metres rather than feet suggesting a British origin rather than USA Historical Significance: Ross Virgo was reported by his son to have regularly visited small communities around his home town and this item is part of his travelling equipment. How Acquired: Donated by Bruce Virgo, son of Ross Virgo, Townsville optometrist Date Acquired: Nov 2014 Condition: Good Location: Archive room. West wall. Unit 4 Drawer 3 |