Which refractive media of the eye changes shape to help focus light for accommodation to have a clear image of visual field?

The refractive media of the eye that changes shape to help focus light for accommodation is the lens. The lens is a flexible, transparent structure located behind the iris and the pupil. It plays a crucial role in focusing light onto the retina, which is essential for clear vision.

When we look at objects that are close to us, the ciliary muscles surrounding the lens contract, causing the lens to become thicker and more curved. This increase in curvature allows the lens to bend light rays more sharply, which helps focus them properly on the retina. Conversely, when we look at distant objects, the ciliary muscles relax, and the lens becomes flatter, allowing for a different focal distance. This ability of the lens to change shape for focusing light is known as accommodation.