Constitutional conditions combined with ametropia, the cause of asthenopia / by D.B. St. John Roosa.

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Constitutional conditions combined with ametropia, the cause of asthenopia / by D.B. St. John Roosa. Public Domain Mark. 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.