Refraction and How to Refract : Including Sections on Optics, Retinoscopy, the Fitting of Spectacles and Eyeglasses, Etc. (1904)

New (perfect condition)

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Pages are clean and are not marked by notes, highlighting or folds.

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Pages are intact and may have minimal notes and/or highlighting or folds.

Good (clean condition)

All pages and the cover is intact. The spine may show signs of wear. Pages include notes and/or highlighting.

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All pages and the cover is intact. Pages include considerable notes in pen or highlighter, but the text is not obscured.