Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Refraction of the eye : its diagnosis and the correction of its errors : with a chapter on keratoscopy / by A. Stanford Morton. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.