contact lens

Contact lens is generally a small lens that can be placed over the eye ball for better vision. These lenses are introduced inorder to avoid the need to wear spectacles. It is very small and compact and is invisible most of the time. Nowadays there are quite a few varieties of cheap contact lens available throughout the world. But most of the people prefer disposable contact lens as it is much advantageous. But these lenses should be maintained with utmost care as it can be easily lost due to its small size. But when we compare contact lens with spectacles both has its own merits and demerits.