What is the process known as accommodation in terms of vision?

Accommodation is a critical process that occurs in vision, involving the eye's ability to adjust the shape of the lens in response to the distance of objects. When an object is close, the ciliary muscles contract, allowing the lens to become thicker and more curved. This increased curvature enables better focus on near objects. Conversely, when looking at distant objects, the ciliary muscles relax, and the lens flattens. This dynamic adjustment is essential for maintaining clear vision across various distances, whether reading a book or viewing a landscape.

Understanding accommodation is fundamental in vision training and helps in recognizing that our eyes continuously make these adjustments to ensure we can clearly see objects at varying distances. The other options relate to different aspects of vision or eye health but do not specifically address the lens's role in distance adaptation, which is at the core of the process of accommodation.