What is the process of accommodation in the eyes?

The process of accommodation in the eyes primarily involves the adjustment of the lens to focus on objects at varying distances. When viewing a close object, the ciliary muscles contract, allowing the lens to become thicker and more rounded, which increases its refractive power. This adjustment is essential for clear vision at near distances.

In addition to the changes in the lens, during accommodation, the eyes also converge, meaning they move inward toward each other to maintain a single binocular vision. This convergence helps both eyes to align properly with the object being focused on. Dilation of the pupils can occur as well, although that is more related to light conditions rather than the accommodation itself.

While the other options touch on aspects related to eye function, they do not encompass the complete process of accommodation. For instance, maintaining focus on a close object is part of accommodation, but it does not describe the full mechanism that includes convergence and changes in the lens shape. Maintaining a fixed position during movement and blinking in response to light are separate reflexes and actions unrelated to the accommodation process.