The IVEX Study.

In this study we have investigated the merits of a binocular refraction. This study used the IVEX refraction system to compare monocular and binocular refractions. The IVEX allowed us to have almost identical conditions for both refractions. Each subject was refracted in a standard examination room by monocular and binocular techniques as a control then examined again with the IVEX system. In this project we looked at changes in cylinder power, cylinder axis, and the balance between the eyes. The experiment showed that statistically the two techniques were the same but there were some differences that may be significant clinically.