Parts of a lensnikon

Author: Roberto Grujičić, MD • Reviewer: Dimitrios Mytilinaios, MD, PhD Last reviewed: October 30, 2023 Reading time: 1 minute

Drake, R. L., Vogl, A. W., & Mitchell, A. W. M. (2015). Gray’s Anatomy for Students (3rd ed.). Philadelphia, PA: Churchill Livingstone.

Parts of a lenseye

The main function of the lens is to transmit and focus the light onto the retina in order to create clear images of observed objects at various distances. The lens is also the main structure of the accommodation reflex. This reflex is activated when the eye focuses on closer objects. The activation of the reflex pathway leads to the increase of the lens curvature which increases the refraction power of the eye (i.e. eye's focus).

Parts of a lensand their functions

The lens is comprised of three main parts: capsule, epithelium and fibers. Although it has many layers, the lens is transparent.

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The lens is an ellipsoid structure located in the eyeball. It lies posterior to the iris and anterior to the vitreous body. Moreover, the lens is encircled by the ciliary processes, and is attached to them by the zonular fibres.

Parts of a lensPhysics

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Parts of a lensdiagram

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