Stenopaeic lorgnette for clinical refraction
 Catalogue Number: 2010 Stenopaeic lorgnette for clinical refraction Category: Equipment Sub-Category: Equipment, other clinical Year Of Publication/Manufacture: c1920 Time Period: 1900 to 1939 Description Of Item: Small instrument on ebony handle for clinical refraction.Rotating disc has 3 slits of differing widths and 5 holes of various diameters. A spring clip can hold an auxilliary lens of 37mm diameter. The slits are to determine the cylinder axis of a refractive error. The holes are to narrow the central bundle of rays. L: 14.2 cm x W: 4.2 cm Historical Significance: Refer: Hirschberg's History of Ophthalmology, Volume 11, Part 2, pp A70, A71 How Acquired: Not known Condition: good, mild corrosion Location: Archive room. West wall. Unit 6 Drawer 4 |