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A rare, early Helmholtz-pattern opthalmoscope, c.1852 (brass & ebony instrument with glass lenses in silk-lined...
IMAGE
number
CH3741227
Image title
A rare, early Helmholtz-pattern opthalmoscope, c.1852 (brass & ebony instrument with glass lenses in silk-lined leatherette case)
brass and ebony instrument with glass lenses in silk-lined leatherette case
Date
c. 1852 AD (C19th AD)
Dimensions
175x83x43 cms
Image description
A Helmholtz-pattern lacquered- and oxidised-brass ophthalmoscope circa 1852, unsigned, the eyepiece frame with removable section for correction lenses, protective felt washer and 10mm aperture, 56° angled frame holding three plane parallel glass plates, with ebony handle, seven of eleven corrective lenses, contained in purple plush and cream-silk lined leatherette case.
One of the greatest minds of the nineteenth century, the German physician and physicist Hermann Ludwig Ferdinand von Helmholtz (1821-94) worked in the fields of conservation of energy, sensory physiology, ophthalmic optics, acoustics and aesthetics, and electromagnetism. In 1850, Helmholtz invented the ophthalmoscope and revolutionised ophthalmoscopy.
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