keratometer
ophthalmometer

One instrument, called a keratometer, shines a pattern of light onto the cornea.

The keratometer determines the steepest and the flattest curves.

The keratometer is also used to fit contact lenses and to monitor corneal curvature after eye surgery.

A keratometer may also be used to estimate astigmatism by finding the difference in power between the two primary meridians of the cornea.

Origins of the Keratometer and its Evolving Role in Ophthalmology.

A keratometer may be used to measure the curvature of the steepest and flattest meridians in the cornea's front surface.

With his student Hjalmar August Schiøtz (1850-1927), he constructed an early keratometer, also known as the "Javal Schiötz ophthalmometer".

A keratometer is a diagnostic instrument for measuring the curvature of the anterior surface of the cornea, particularly for assessing the extent and axis of astigmatism.

The Bausch and Lomb Keratometer is a one position Keratometer that gives readings in dioptric form.

The Javal-Schiotz keratometer is a 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.

The eye examination may proceed to measurement of the localized curvature of the cornea with a manual keratometer, with detection of irregular astigmatism suggesting a possibility of keratoconus.

While in Paris, he invented a keratometer with Dr. Louis Émile Javal that was to become known as the Javal-Schiøtz ophthalmometer, an optical instrument used to measure the curvature of the anterior corneal surface.

With his student Hjalmar August Schiøtz (1850-1927), he constructed an early keratometer, also known as the "Javal Schiötz ophthalmometer".

A keratometer, also known as a 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.