The Structure and Function of Eye Lenses

The eye lens has a complex structure. Its refractive index is proportional to the distance and size of objects in front of it, and it maximises its transparency by removing cellular structures. The lens fibres are composed of fibrous cells with high concentrations of the crystallin proteins, and they korean colored lenses AU undergo degradation of all large cell structures and organelles. In the centre of the lens, the largest oligomers are located, while smaller dimers form the bulk of the cortex.

The human lens is flexible, and it can change its curvature in response to changes in the distance or angle of focus. The zonules and ciliary muscle in the lens allow the eye to adapt its focus. A lens with a short focal distance has a thicker surface and a higher refractive power than a lens that is focused at a distant point. In order to change the focus to a farther distance, the lens must be relaxed.

The lens transmits light from the cornea to the retina. The crystalline lens has a zonular fibers that extend from the ciliary body and form the frame of the lens. The iris creates a round aperture called the pupil and regulates the amount of light entering the eye. In addition to the iris, the lens sits just behind the iris, which changes in size and shape to regulate light and provide a sharper focus.