Accommodation - GCSE Biology Definition

Accommodation in the context of GCSE Biology refers to the process by which the eye adjusts its focus to see objects clearly at different distances. This involves the ciliary muscles changing the shape of the lens to alter its focal length. When focusing on near objects, the ciliary muscles contract, causing the lens to become thicker and more curved, increasing its refractive power. To focus on distant objects, the ciliary muscles relax, making the lens thinner and flatter. This adjustment ensures that light is focused accurately onto the retina for clear vision across different distances.