Hydrodiascope
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
The hydrodiascope is an optical device designed to improve vision in cases of keratoconus by neutralizing the irregular curvature of the cornea with a saline solution. It consists of a small box filled with physiological saline that attaches to the orbit, coupled with a corrective plano-convex lens. The device lacks practical significance today as prolonged wear is poorly tolerated by the eye.
Encyclopedia entry (1928–1936)
HYDRODIASCOPE, an instrument for improving vision in keratoconus. It consists of a small box, open on one side and fitted with glass on the other. It is applied to the eyes with its open side and, thanks to the fact that its edges are provided with a rubber gasket, it firmly suctions to the edges of the orbit. The box is filled with physiological saline solution, so that the irregular curvature of the cornea is neutralized. A plano-convex lens correcting the refraction is placed in front of the hydrodiascope. The hydrodiascope has no practical significance, since prolonged wear of it is not tolerated by the eye.
Related articles
Cite this page
“Hydrodiascope.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/hydrodiascope/