The term 'lens' is used to describe a variety of optical devices. An EYEPIECE is an optical device that is placed at the end of a telescope or microscope, allowing the user to view the magnified image. Eyeglasses are lenses that are worn to correct vision problems. An OPTIC is a device that transmits light, such as a lens or mirror. GLASS is a transparent material that can be used to make lenses. A MENISCUS is a curved lens that is used to focus light. A PRISM is a transparent object with flat surfaces that refracts light. Finally, a camera component is a part of a camera that uses lenses to capture images.