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Subjects
- Ophthalmology -- instrumentation[remove]4
- Burnett, Swan M. (Swan Moses), 1847-1906.1
- Cataract Extraction1
- Davis, Achilles Edward, 1866-1941.1
- Eye Diseases1
- Eye Diseases -- therapy1
- Eyeglasses1
- Harvard College (1780- )1
- Myopia -- epidemiology1
- Refractive Errors -- diagnosis1
- Refractive Errors -- therapy1
- Snellen, H. (Herman), 1834-1908.1
- Students1
- United States1
- Vision Disorders -- therapy1