Quantitative Approach for the Analysis of Fusional Convergence Using Eye-Tracking and SacLab Toolbox

Figure 2

Examples of ET recordings: (a) successful “fusion”: convergence occurs (vergence angle >0); convergence amplitude (CA) falls in the range of PM ± 1°; stable convergence is maintained for more than 2 seconds. (b) “Failed” fusion: attempt to fuse, but CA is not maintained. (c) “Failed” fusion: rapid switching of both eyes from one position to another, without ever reaching the expected CA. For all tests the inserted prism was 10Δ.

(a)

(b)

(c)