'Fitting glasses,' the diagnosis of errors in refraction, the influence of eyestrain, etc. / by George M. Gould.

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'Fitting glasses,' the diagnosis of errors in refraction, the influence of eyestrain, etc. / by George M. Gould. Credit: 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.. In copyright