A diagram to show the principle of Helmholtz's ophthalmoscope. Pen and ink drawing.
- Date:
- 1867
- Reference:
- 16577i
Licence: Public Domain Mark
Credit: A diagram to show the principle of Helmholtz's ophthalmoscope. Pen and ink drawing. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0015924/full/800%2C/0/default.jpg)