A rare and historically important antique Folin Ophthalmoscope, dating to around 1865. This instrument was commissioned by Folin from the celebrated Parisian instrument maker Nachet, who crafted it to Folin’s own specification — placing this piece firmly within the distinguished tradition of 19th century French precision optical instrument making.
The ophthalmoscope consists of a brass frame supporting a concave glass mirror with a clear central aperture, through which the examiner peers during fundus examination. The ivory handle is screwed directly into the frame, providing a secure and comfortable grip. On the reverse of the disc, four correcting lenses are mounted — two of minus power and two of plus — which can be rotated in front of the aperture to compensate for the refractive errors of either the examiner or the patient, a significant functional refinement for its era.
Nachet of Paris was one of the foremost scientific instrument makers of the 19th century, renowned for the quality and precision of their microscopes and optical devices. An ophthalmoscope bearing the Nachet connection is a particularly desirable piece for collectors of antique ophthalmic instruments and French scientific instrument history alike.
This is a fine and genuine example of mid-19th century ophthalmic instrument design, representing an important chapter in the development of the modern ophthalmoscope.
