What are the optical devices that use the lens. What is the purpose of these devices?

Lenses are widely used in everyday life and technology. They are found in cameras, camcorders, telescopes, binoculars, optical and electron microscopes, magnifiers, optical lenses for reading and writing are used in computer and consumer drives for reading Blu-Ray, DVD, CD disks. Cameras take pictures, video cameras take videos, telescopes and binoculars are used for observation, as are electronic and optical microscopes, magnifiers, etc.