[A phototopographic method of measuring the thickness of the cornea]

This method is based on asymmetric growth and distension of the cornea in various directions. One has just to ascertain the visual line projection site on the corneal surface and to measure the corneal thickness in but two points, in the centre and lower, near the limbus; then the thickness of the cornea at any site of the cornea may be calculated, for the cornea is the thinnest at sites where the limbus is the furthest from the centre. The accuracy of this method is not inferior to that of the known optic method.