A convex lens is a transparent optical device that is thicker in the center than at the edges. It bends light rays that pass through it, causing them to converge or come together. This property makes convex lenses useful in various applications, such as in eyeglasses for correcting vision, cameras for focusing images, and microscopes for magnifying small objects. Convex lenses can produce different types of images depending on the distance of the object from the lens. When an object is placed far away, the lens creates a real, inverted image. However, when the object is closer, it can produce a virtual, upright image. This versatility is why convex lenses are essential in many optical instruments.