Polaroid Bar Vergences.

Polaroid Bar Vergences is a modified vergence test at near utilizing the technique of the polaroid vis-a-vis (as originally developed by J.R. Griffin) and a bar prism to determine near point limits of BI and BO vergence movements. The intent of this paper is twofold:
To investigate the relationship of standard near bar vergence testing with PBV utilizing an adult and pediatric clinic sample. Utilization of the PBV in two vision screenings: to compare findings with the Modified Clinical
Technique Pass/Fail criterion in the first vision screening to use in a second, larger screening, as a Pass/Fail screening tool criterion of near point vergence ranges.