The protein crystallins in human eye lenses are the most abundant proteins in the body. These molecules possess high refractive index increments and large aromatic and sulphurous residues. In addition, they absorb UV light strongly. Their concentration in lens cells is 320 mg ml -1. By the ten-mm stage, the lens vesicle separates from the surface ectoderm.

The main function of the eye lens is to focus light on the retina. It helps to change the focal distance of the eye by changing its shape. The lens’s shape is biconvex, and is similar to the ellipsoid shape of a sphere stretched out. The adult lens is 10 mm long and four mm in diameter from front to back. It changes korean circle lenses AU shape as the distance is adjusted, causing the retina to become focused on the object.

The human lens has three layers that vary in their refractive index. One layer is densely packed with crystallin proteins while another layer is thin and amorphous. These layers are separated by the cornea. The thickness of the lens varies depending on the focal distance. The thicker the lens, the higher the refractive power. The thinned lens is thinner than the other two layers. The cornea is the third layer, which holds the lens in place and provides the eye with aqueous humor.

The crystallin proteins in human eye lenses are abundant in all vertebrate species. These proteins form a variety of oligomeric structures, including a-, b-, and g-crystallin. The lens cortex is made up of small dimers. They are the main part of the human eye. They make up the majority of the human eye’s lens. There are two distinct types of crystallin: