Skip to main content
Thesis

Cylindrical determinations compared using Jackson Cross Cylinder technique and modified Lebensohn's Arrowhead chart

1 April 1969

Abstract

The purpose of this study is to make a comparison between the Jackson Cross Cylinder technique for determining the axis and power of the far cylinder correction and with the axis and power determination obtained by a subjectively rotated Lebensohn's Arrow-head Figure type astigmatic chart. The question to be resolved is whether the Lebensohn's Arrow-head Figure type chart could be substituted for the Jackson Cross Cylinder test for the determination of both astigmatic cylindrical power and axis.


Files

Files are restricted to Pacific University. Sign in to view.