
Description
Keystone Eye-Comfort Training, c.1940
A group of 25 Keystone Eye-Comfort Training Stereocards, featuring images and graphics used as a vision therapy for reading-related eye fatigue, premature presbyopia, and diminished focusing ability, including an original booklet with general information and instructions for use for the Delta Unit; the booklet describes exercises in six stages, and it features a table chart for users to record their progress, annotated in pencil and dated 1944.
Buyer's Premium
29%
Keystone Eye-Comfort Training, c.1940
Estimate £30-£40
Starting Price
£30
Photographica Timed Online
Mar 16, 2026 1:00 PM EDTLondon, United Kingdom
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