In the case of esotropia, the eye turns in. What base direction can help?

In the case of esotropia, where one eye turns inward, the intervention typically involves the use of prisms to help align the eyes. When utilizing a prism in the optical correction, the base direction refers to the thicker part of the prism. In the context of esotropia, placing the base outward (away from the nose) assists in redirecting the line of sight outward, effectively helping to counteract the inward turn of the affected eye.

This aids in creating a more aligned visual axis and can improve binocular vision for the patient. The outward base direction effectively encourages the eye to move away from its inward position, leading to better alignment and reduced eye strain. Thus, the correct approach for managing esotropia is to use a prism with the base directed outward.