Key points are not available for this paper at this time.
Normal values for asymmetric prism bar vergences were derived from the clinic population of the School of Optometry, University of Alabama in Birmingham. The means, standard deviations, effect of order of prism presentation, and eye dominance were examined for three clinical groups. The results provide standards for prism bar vergence and demonstrate that order of testing and dominance have no significant effect upon the values obtained.
M D Wesson (Sun,) studied this question.