History and growth of contact lenses
True in fact the concept of the contact lenses stretches back to the ages of Leonardo da Vinci. About five hundred years ago, Leonardo da Vinci sketched out few ideas for changing the refractive power of the eye by direct contact with water. Then on, inventors experimented, with the changing refractive powers by looking through both water and glass. Since 120 years German inventors first made an actual contact lens and placed it on an eye. Those first contact lenses, called scleral lenses, which are made of glass, and they usually fit over the sclera or white part of the eye, as well as the cornea, too. The modern contact lens was born more than a half-century ago and was actually made of a hard plastic which will rest upon the tear film on the front of the eye. The smaller size and lighter weight of this corneal contact lens made it far more comfortable than the scleral lens. Many newer generations are been introduced since then and even till today and these newer generations of these oxygen permeable lenses offer clear, stable vision and comfort, to the users. The contact lens wearing population actually started growing because of its comfort ability and with the advances in the manufacturing and economies of scale was invented the disposable contact lenses which greatly enhanced convenience, comfort and affordability to the user of the contact lenses. Now today, virtually any contact lens designed for virtually any vision need or disorder is available in a disposable format which makes trying the contact lenses more economical and makes caring for them in a simple way. Then comes the advancement in the lens care systems and the lens care systems of the early days actually included heat and hydrogen peroxide disinfection, as well as enzymatic cleaners to remove protein deposits but these methods largely have given way to the simplicity of one-bottle multipurpose care solutions.