| Time Period Manufactured | Pre-1930 |
|---|
Check the listing for details. Pre-1900 Antique American Optical Trial Frame Adjustable Metal Optometrist. Listed at 425.00 USD. This item is an antique American Optical trial lens frame, often used for eye exams in the late 19th and early 20th centuries. Manufacturing Date: Patents stamped on similar frames date to April 30, 1895. Function: These frames held various lenses during eye exams to determine a patient's prescription. Unique Features: The frame includes gear adjustments, adjustable arms, and measurement markings such as "4 TEMPLE" and "PUPIL". Materials: Typically constructed from steel and brass.
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