De Zeng Ophthalmoscope
Henry L. De Zeng Ophthalmoscope
1922
The Ophthalmoscope was patented by Henry L. De Zeng in 1922 and was used to check the interior of the eye for retinal ditatchment and other eye diseases.
Henry L. De Zeng Ophthalmoscope
1922
The Ophthalmoscope was patented by Henry L. De Zeng in 1922 and was used to check the interior of the eye for retinal ditatchment and other eye diseases.