BiPrism Effects On Fixation Disparity Curves Of Convergence Insufficients.

Fixation disparity curves were taken on six convergence innsufficients. Each CI patient was subjected to a reading task in which fixation disparity curves were taken before and after the reading task. This procedure was performed a day later. However, 4BI prism in the form of spectacles were worn while performing the reading task. Wearing the 4BI prism spectacles proved to be statistically significant in reducing exodisparity for a given prism demand of 2BI, 0, 2BO, 4BO, 6B0. compared to the disparity measurments taken without prism after lthe near task.