Lenses are transparent objects, usually made of glass or plastic, that bend light to help us see better. They are commonly found in items like glasses, cameras, and microscopes. By focusing light, lenses can magnify images or correct vision, making them essential tools in everyday life. There are different types of lenses, such as convex and concave. Convex lenses are thicker in the middle and can make objects appear larger, while concave lenses are thinner in the middle and can help correct nearsightedness. Understanding how lenses work helps us appreciate their role in technology and science.