Trial lens set

Found In:

17319721

Description

Title: Trial lens set
Creator: Carmalt, William Henry (1836-1929)
Contributor: Bernard Kosto, M.D.
Yale University. School of Medicine.
Published / Created: early 20th century
Description: An incomplete set of trial lenses for visual testing for the bifocal component of an eyeglass prescription, from +0.5 diopters to 3.25 diopters. Each lens measures 2 cm. in diameter, set within a secondary lens measuring about 4 cm. in diameter. The set is housed in a leather covered wooden case, with velvet covered inserts.
Extent: (case dimensions): 12.5 cm. x 9.8 cm. x 4.8 cm.
Language: No linguistic content; Not applicable

Access: Public
Rights: The use of this image may be subject to the copyright law of the United States (Title 17, United States Code) or to site license or other rights management terms and conditions. The person using the image is liable for any infringement.