The sensory theory not only successfully explains confusion and diplopia but it also explains co-variation and therefore it is the prevailing explanation for ac.
The problem or the major criticism of sensory theory is that it depends on very precise amounts of deviation. Because if i have it wired for 20d esotropia and then all of a sudden it changes to a 10d, then the system isnt wired for that. So the sensory theory has a hard time accounting for changes in eye turn. As we know clinically that some pts change their eye turn and their correspondence system adjusts for that. And that's its principle of co-variation, that the variation in my anomalous system varies by the angle of deviation.
