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.
Subject (Name):
Bernard Kosto, M.D. and Yale University. School of Medicine.
An Impression-applanation tonometer (model OTM-1). Includes tonometer, a bottle of Aplacote dye, two tubes of disposable tonometer endplate caps, a pad of transfer and recording paper, and a glass disc with a measuring scale. Includes two pages of instructions, as well as a guide printed under the lid of the box. Designed by Adolph Posner and Richard Inglima.
Subject (Name):
Bernard Kosto, M.D., Inglima, Richard, Posner, Adolph, and Yale University. School of Medicine.
A retinoscope set, sans two of the three heads usually featured with. The included head has a diameter of 45 mm. The device is housed in a leather covered case with velvet lined fittings.
Subject (Name):
Bernard Kosto, M.D. and Yale University. School of Medicine.
Compound ophthalmoscope, one wheel with six lens powers (including empty hole), one with ten (including empty hole). Lens wheels on separate plate stamped "GIROUX PARIS" and "BT S.G.D.G. NO 3". Lens wheel plate clips onto head of handle. Head of handle has a small prism with a sliding cover. Electrical supply runs up into head, but its use is not obvious. Current switched by a metal spring bound to the wooden handle with copper wire. Wires terminate in copper spade terminals soldered to pins. Case is probably wood, covered with leather. Push-button sprung catch.
Subject (Name):
Bernard Kosto, M.D. and Yale University. School of Medicine.