author
Daniel Woolf
1883–1932
An early-20th-century eye specialist, he wrote a practical guide to refraction and muscular imbalance built around the use of the ski-optometer. His surviving work points to a hands-on interest in making vision testing more systematic and easier to use.
1 Audiobook
About the author
Daniel Woolf (1883–1932) is known from library and public-domain records as the author of Refraction and Muscular Imbalance, as Simplified Through the Use of the Ski-Optometer, published in New York in 1921 by Woolf Instrument Corporation.
The book is a technical, practice-focused work on examining the eye, especially refraction and muscular imbalance. From the title, publication details, and the instrument-centered approach of the text, he appears to have worked closely with the tools and methods of optometry during a period when eye testing was becoming more standardized.
Little biographical information about his life was available in the sources I could confirm here, so this overview stays close to the record of his published work. Even so, that book preserves a clear picture of an author interested in practical ophthalmic technique and in simplifying complex procedures for working professionals.