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Keratometer

A keratometer, also known as an ophthalmometer, is a diagnostic instrument for measuring the curvature of the anterior surface of the cornea, particularly for assessing the extent and axis of astigmatism. It was invented by the German physiologist Hermann von Helmholtz in 1851, although an earlier model was developed in 1796 by Jesse Ramsden and Everard…

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Bausch and Lomb principles

Dioptres
1 related topics

Overview

CorneaAstigmatismGermanPhysiologistHermann von Helmholtz
7 related topics

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Bausch and Lomb principles

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Keratometer

Nodes11
Edges10
Triples25
Avg. degree1.82
Density0.181818
Components1

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Keratometer

Top relations

related to References · 10
Keratometer → Annales, Evolving Role, Gutmark, Guyton DL, Ophthalmology, Origins, Paris, Schiötz, Survey, Un
related to Bausch and Lomb principles · 9
Keratometer → As, In, It, Javal-Schiotz, Lomb Keratometer, Scheiner, The, The Bausch, This
related to Javal-Schiotz Principles · 4
Keratometer → In, It, Scheiner, The Javal-Schiotz
is a · 2
Keratometer → one position keratometer that gives readings in dioptric form, two position instrument which uses a fixed image and doubling size and adjustable object size to determine the radius of curvature of the reflective surface

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Important terminology

surface object uses two size image javal-schiotz instrument fixed bausch lomb curvature radius known axis distance reflective formula cornea astigmatism

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Keratometeris atwo position instrument which uses a fixed image and doubling size and adjustable object size to determine the radius of curvature of the reflective surface0.90text
Keratometeris aone position keratometer that gives readings in dioptric form0.90text
Keratometerrelated to Bausch and Lomb principlesThe Bausch0.60section
Keratometerrelated to Bausch and Lomb principlesLomb Keratometer0.60section
Keratometerrelated to Bausch and Lomb principlesIt0.60section
Keratometerrelated to Bausch and Lomb principlesJaval-Schiotz0.60section
Keratometerrelated to Bausch and Lomb principlesThe0.60section
Keratometerrelated to Bausch and Lomb principlesScheiner0.60section
Keratometerrelated to Bausch and Lomb principlesAs0.60section
Keratometerrelated to Bausch and Lomb principlesIn0.60section
Keratometerrelated to Bausch and Lomb principlesThis0.60section
Keratometerrelated to Javal-Schiotz PrinciplesThe Javal-Schiotz0.60section

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