In the condition of exotropia, if the eye turns out, which base direction can help?

In the condition of exotropia, where one eye turns outward, the concept of base direction in prism therapy plays a critical role in helping to align the eyes. When considering the need to correct an outward deviation, using a prism with the base directed inward (toward the nose) can effectively help to restore alignment. This inward base direction assists in allowing the eye that is positioned outward to move toward the midline, promoting better eye coordination and fusion.

Prism therapy works by helping to shift the line of sight and compensating for the existing deviation. The inward base direction provides an optical effect that helps the eye with exotropia to turn inward more easily, facilitating visual alignment and potentially improving binocular vision. Understanding how base direction interacts with the deviations presents a fundamental aspect of managing strabismus conditions like exotropia.