PC (Perspective Control) lenses allow the photographers to adjust and control the appearance of the viewpoint in the image. Very often they are used to prevent the meeting of parallel lines especially at the time of photographing a tall object. Lenses which offer only shift are called shift lenses while some lenses can also tilt and are called tilt shift lenses. Short-focus PC lenses are used mainly in architectural photography and other applications such as landscape, product and closeup photography. PC lenses are generally hold the application in single-lens reflex (SLR) cameras as photographer is not able to view directly the effect of lens by range finder camera. A PC Lenses have a bigger image circle than needed to capture the image area.PC lenses also known as space lenses or universe lenses are the material which enables space exploration equipment to adjust to the special environment of space. It is a viscous material of high persistence due to which it cannot be broken easily. PC lenses are 10 times as strong as traditional resin lenses and 60 times as strong as glass lenses. PC lenses having thickness of 2.5 cm finds application in the products such as bullet proof glass, aircraft canopies, as a transparent glass in the aviation industry and in astronaut helmets. People are advised by the eye care professionals to wear glasses having PC lenses for eyeware safety at work and during sporting activities.
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PC lenses holds application in glasses of the car window due to the some of its advantages such as large freedom of design, weight reduction, impact resistant, improved productivity and allowed the development of a new headlamp concept. In addition, PC lenses hold its application in eyeglasses, sunglasses and sports eyewear due to its lightweight property. The advancement of more oxygen permeable materials has increased the comfort of contact lenses and appropriate for extended wear. PC lenses are also suitable for the people who has the habit of wearing rimless eyeglass frames as these lenses has less possibility of getting fractured than glass or plastic lenses