Category: Ophthalmology
Estimated Date: 1900
Name: Optometer
Manufacturer: unknown
Description: 11” long nickle plated rod with a 1.25” eyepiece at one end with lens and a moveable disc with words count the dots and a number of dots below it. There is a 1 1/8” handle by the lens, one end of the rod is marked concave, the other convex and the top is calibrated.
Reference 1: 286