The principles of refraction in the human eye : based on the laws of conjugate foci / by Swan M. Burnett ; illustrated with 25 original diagrams by Chas F. Prentice.

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The principles of refraction in the human eye : based on the laws of conjugate foci / by Swan M. Burnett ; illustrated with 25 original diagrams by Chas F. Prentice. In copyright. Source: Wellcome Collection.

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