Ophthalmoscope n. (Physiol.) An instrument for viewing the interior of the eye, particularly the retina. Light is thrown into the eye by a mirror (usually concave) and the interior is then examined with or without the aid of a lens.
... talk about, but that it bears little agreement to the real conditions. Let me tell you that you are mistaken. Go ask Roentgen why he did not keep the X-rays a secret to be exploited for his own personal gain. Ask the shade of the great Helmholtz why he did not patent the ophthalmoscope. Go to the University of Wisconsin and ask Professor Babcock why he gave to the world without money and without price the Babcock test—an invention which is estimated to mean more than one million dollars every year to the farmers and dairymen of that state alone. Ask the men on the geological ... — Craftsmanship in Teaching • William Chandler Bagley
...
