The lens of the eye refers to a transparent, biconvex, and flexible structure located behind the iris and the pupil, which plays a crucial role in the process of vision. It is primarily responsible for focusing light rays onto the retina, enabling clear and sharp vision.
The lens is made up of specialized cells known as lens fibers, which are densely packed together to form a clear, jelly-like structure. Its shape is convex on both sides, similar to a magnifying glass. Due to its flexibility, the lens can change its shape to accommodate differences in the distance of objects being viewed, a process known as accommodation.
When we gaze at a nearby object, the muscles surrounding the lens contract, causing it to thicken and become more curved, thus increasing its refractive power. This adjustment allows for the proper bending of light rays, ensuring the formation of a focused image on the retina. Conversely, when observing objects at a distance, the ciliary muscles relax, causing the lens to become thinner and less curved, decreasing its refractive power.
The lens of the eye, together with the cornea, assists in refracting light rays, correcting common vision impairments such as nearsightedness (myopia) and farsightedness (hyperopia). Additionally, it plays a vital role in filtering and absorbing harmful UV radiation. The lens of the eye is a remarkable anatomical structure that contributes significantly to our ability to perceive the world around us.
