Final answer:
Convergence is the medial movement of the eyes when focusing on close objects; it's paired with the accommodation of the eye lens, both part of the accommodation-convergence reflex.
Step-by-step explanation:
The term for the medial movement of the eyes during focusing on close objects is called convergence. This is a nonconjugate movement necessary for maintaining binocular vision when a visual stimulus moves closer to the face. During convergence, the medial rectus muscles of both eyes adduct to allow the eyes to point at the same object, and this is coordinated with the accommodation of the eye. Accommodation refers to a change in the shape of the lens, controlled by the parasympathetic fibers of the oculomotor nerve, to maintain a clear focus on nearby objects. Both the skeletal muscle activity for convergence and the smooth muscle adjustment for accommodation are part of the accommodation-convergence reflex. As one ages, the ability to accommodate declines, and corrective lenses may be needed to focus on close objects, such as reading a book or computer screen.