Medisch optisch instrument – Brass Ophthalmometer (Keratometer) – c. 1885–1895 – 1850-1900 – Frankrijk – Gilbert Paris Javal & Schiøtz

Bel ophtalmometre des années 50-60.Comporte plusieurs marque de fabriquants :Gilbert constructeur ParisGiroux constructeur ParisEt Javal et Schiotz.Quelques petits manques mais reste un superbe objet scientifique de collection.------------------Designed in 1881 by French ophthalmologist Louis Émile Javal and Norwegian physician Hjalmar August Schiøtz at the Sorbonne laboratory, the Javal-Schiøtz ophthalmometer revolutionized medical optometry by enabling precise measurement of corneal astigmatism. Manufactured in Paris by master instrument builder Gilbert, this brass apparatus incorporates a graduated 180-degree dial and a double-refraction prism optical system. It represents a landmark achievement in late 19th-century physiological optics and scientific heritage.Technical Condition and Specifications (The Technicals)Brand and Model: Gilbert Paris – Javal & Schiøtz OphthalmometerManufacturing Year/Era: c. 1885–1895 (Invention established 1881;