People who make the switch from spectacles to contact lenses can vouch that the improvement is significant. Although a good pair of glasses will minimize your vision correction and give you almost near-perfect vision, there is something to be said about the 360 degree clear-vision and utter comfort that a pair of good contact lenses provide. So what is it that makes lenses a superior technology in vision correction? Let’s find out. The Purpose of Contact Lenses The right pair of lenses will sit on your eyeballs so snugly that you won’t even notice their presence. The main purpose of the contact lenses is to help focus the light rays properly on your retina. These lenses are designed for maximum refractive power correction and to maintain occular health. While putting them on, hands should be properly washed/sanitised, contact lenses need to be clean and well lubricated with the solution. The concave surface of the lens needs to sit in contact with the tear film on the surface of the cornea. Now to understand how lenses work, we must first understand the need for vision correction. The reason behind poor vision The most commonly seen reason behind poor vision, be it nearsightedness or farsightedness, is a deformity in the shape of the eyeball. Due to whatever reason, sometimes the eyeball can get deformed, resulting in improper focusing of the light on the retina, which causes poor eyesight. How lenses work on Farsightedness With farsightedness, there is no proper focus of the light rays inside your eye. Since the light rays focus beyond the retina, it is unable to capture a clear focused image of the object. This means that the eye does not have proper focusing power. The contact lens converges the light rays coming in, moves the focus point forward onto the retina and thus increases the eye’s focusing power. How lenses work on Nearsightedness With nearsightedness, the light rays are focused at a point much ahead of the retina. In this case, the contact lenses will diverge the light rays in order to get them to focus at a point on the retina, thus forming a clear vision of the image.