A keratometer may be used to measure the curvature of the steepest and flattest meridians in the cornea's front surface.
2.
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 iris, natural crystalline lens, and cornea.
3.
Our article Keratometer ( see previous question ) refers to " Scheiner's rule " and a " Scheiner disc " . talk ) 12 : 13, 5 July 2014 ( UTC)
4.
A keratometer uses the relationship between object size ( O ), image size ( I ), the distance between the reflective surface and the object ( d ), and the radius of the reflective surface ( R ).
5.
In converting the measurements obtained from the corneal surface into a dioptric value, the B & L keratometer uses the general lens formula ( n-n ) / R and assumes an n of 1.3375 ( compared to the actual corneal refractive index of n = 1.376 ).
मोबाइल