A rare and historically significant antique ophthalmoscope in the Eperon style, presented in its original fitted case with burgundy velvet lining. This instrument closely follows the Eperon design with one notable variation: the mirror aperture is circular rather than the rectangular opening described in the original specification.
The long axis of the plane mirror is arranged vertically, with a clip on the side fastened by two swivel joints, allowing a 2.5-diopter convex lens to swing in front of or behind the mirror. Used alone, the plane mirror performed skiascopy and illumination of the transparent ocular media. With the lens behind the mirror, the instrument examined intraocular clouding; with the lens in front, it achieved the optical effect of a concave mirror with slight magnification of the inverted image. An inverting lens is also included.
Manufactured by Pfister & Streit, precision machinists of Bern — the workshop that would later become the renowned Haag-Streit AG. Complete with all original components in its fitted oval velvet case.
