Lenses are made from materials such as glass or plastic and are ground, polished, or molded to the required shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing.
Single lenses are used in eyeglasses, contact lenses, pocket magnifiers, projection condensers, signal lights, viewfinders, and on simple box cameras. More often a number of lenses made of different materials are combined together as a compound lens in a tube to permit the correction of aberrations.
Yes, contact lenses can generally be a better option than eyeglasses for a number of reasons. Apart from the aesthetic advantages, contact lenses move with your eye, allow a natural field of view, and have no frames to obstruct your vision.
At a very basic level, lenses allow you to focus light onto a sensor or film and produce a clear and sharp image of the scene in front of you. Lenses also let you adjust exposure, modify the plane of focus, and different focal lengths can be used to change your field of view.
Explore a wide selection of prescription glasses, sunglasses, and contact lenses at LensCrafters. Visit our site to find exclusive offers and schedule an eye exam at a location near you.
Explore our wide selection of contact lenses from brands like Acuvue, Air Optix, Bausch and Lomb, Ciba Vision, PureVision, and Soflens. No matter what your comfort preference, if you’re looking to buy contact lenses, Lens Direct has a plethora of options to fit your needs!
An easy-to-follow explanation of how lenses bend light, including the two main types of lenses: concave and convex.
How do lenses work? | What are the different types of lens?
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Learn about the lenses you can choose for your new pair, from prescription types to materials—the works!