The symmetry of our visual apparatus as a dual organ : a plea to modify the customary notation of the ocular meridians / Herman Knapp.

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Credit

The symmetry of our visual apparatus as a dual organ : a plea to modify the customary notation of the ocular meridians / Herman Knapp. In copyright. Source: Wellcome Collection.

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This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.