Contactlenzen, Contactlens are varied forms of the name ?Contact Lens? which have been using for long by many people worldwide. It is a great comfort for the people who need to wear glasses for correct vision but are unwilling to use spectacles of any form. A contact lens can be considered as a corrective, therapeutic or cosmetic lens. The cornea of human eye is where a contact lens is placed. Modern day lenses of this type are very soft and the invention was made by Drahoslav Lim and Otto Wichterle, Czech chemists. One can hardly understand if the person in front of him is wearing a contact lens or not by seeing only. These are easy to wear because contact lenses are generally made lightweight.

A very light blue color is used in most types of Contactlenzen, Contactlens because of clear visibility of those in water when submerged. Also, you will find contact lenses of different colors to make the eyes look different. Wearing colored lenses has also been a part of fashion in recent time. Lenses to be worn by people of different countries are made differently because of the difference in weather condition and physiology of eyes. Contact lenses are worn for different purposes. These offer people a wider range of vision than those wearing spectacles. There are some sports in which wearing contact lenses remain comfortable and beneficial.

While busy in learning the mechanism of the human eye, Leonardo da Vinci discovered a method of altering corneal power directly. This myriad minded person is thus known for bringing the concept the general principle of contact lenses. The first tolerable eye covering was produced by a German glassblower, F.E. Muller in 1887. The first actual corneal lenses were developed in 1949. And the first Contactlenzen, Contactlens of PolyMethyl MethAcrylate (PMMA) got a public acceptance in 1960. Modern silicon hydrogel contact lenses came into the market in 1999.

Contactlenzen, Contactlens neutralizes the mismatch between the refractive power of the eye and the length of the eye. Otherwise, that would lead to a refraction error. It also allows for appropriate focusing of light onto the retina. Eye conditions that can be corrected by using contact lenses are presbyopia, myopia, hypermetropia and astigmatism. Contact lenses need to be submerged in a prescribed solution that cleans those for further wearing. Molded, Spin-cast lenses, Hybrids, Lathe cut are some common types of contact lenses.

Materials that are mostly used in making Contactlenzen, Contactlens are Polymacon, Senofilcon, Methafilcon A, Phemfilcon A, Omafilcon A, Hilafilcon A, Galyfilcon A, Tetrafilcon A, Balafilcon A, Lotrafilcon B, and Hilafilcon B. Factors those become very important while selecting Contact Lenses for a person are Brand, Material, Center thickness, Power in dioptres, Cylinder axis, Base curve radius and Diameter. Popular brands of contact lenses are Bausch & Lomb, Coopervision, Focus, Frequency, Ultraflex, Purevision, Soflens, Biomedics, Ciba Vision, Vertex, Acuvue, Biofinity, Extreme H2O, Freshlook and Proclear. A website named ?contactlens? is there which being founded in 2001 has been serving many people worldwide with many of these branded lenses. The research in this field is continuing worldwide for better making of contact lenses.