American Optical 1921 Lensometer, on display at the Optical Heritage Museum in Southbridge, Mass.
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| Edgar D. Tillyer (l) and Estelle Glancy, inventors of the AO Lensometer. |
| Opticianry educator Blair Wong of the Benjamin Franklin Cummings Institute of Technology (l) talks with Dick Whitney of the Optical Heritage Museum at the recent Museum event honoring American Optical’s 1921 Lensometer. |