Corneal Measurements and Keratometry

Question 1

1619: Christoph Scheiner

Answer 1

First described the principle of comparing the curvature of reflections coming off the cornea to the curvature of reflections coming off small convex mirrors placed next to the cornea.

Question 2

1728: Francois Pourfour du Petit

Answer 2

Invented a device to measure the anterior and posterior chambers of the eye and cornea.

Question 3

1794: Jesse Ramsden

Answer 3

Developed an instrument to measure the cornea to prove that the cornea was the accommodative aspect of the eye.

Question 4

1881: Javal and Schoitz

Answer 4

Modified the 1851 design and created adjustable size mires and fixed doubling.

Question 5

1932: Bausch and Lomb

Answer 5

Created a keratometer that has improved focus, circular mires, and the ability to look at two meridians at once.