Ophthalmoscope

device · 1851 · Industrial Revolution

An instrument for examining the back of the eye (Helmholtz).

Inventor: Hermann von Helmholtz.

What it is made of

Mirror — has part. A mirror.
Lens — has part. Lenses.

Principles and materials it uses

Brass — is made of. An ophthalmoscope is brass.

Take Ophthalmoscope apart