01 / Location & anatomical relationships
Inside the eye, just behind the iris.
02 / Structure & organization
The lens is enclosed by a capsule and suspended through zonular fibers connected to the ciliary body. Changes in ciliary muscle activity alter zonular tension and lens curvature during accommodation.
03 / Function
It changes shape to help focus on near and far objects.
04 / Mechanism
Tiny supporting fibers connect the lens to a ring of muscle. Changes in tension alter its curvature, helping focus light from objects at different distances. It works with the cornea to place a sharp image on the retina.
Part of a bigger picture
The lens belongs in our brain & senses collection. Explore the nearby parts to see how this area of the body fits together.
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Connect structure with function
The lens changes focus for viewing distance, while the iris regulates the aperture. Lens transparency depends on the arrangement and properties of its specialized cells.
Check your understanding
Locate the lens in relation to its neighbors. Explain how the structural features described above support its function, then distinguish it from a nearby structure with a different role.
Keep learning
Continue with OpenStax Anatomy and Physiology for system-level study. This atlas is educational and has not undergone independent medical peer review.