A double-convex lens is compose of two convex surfaces, has a positive focal length. Normally Bi-Convex lenses are most suitable where the object and image are on opposite sides of the lens, and are ...

A magnifying glass contains a lens that’s made into a convex shape in order to better see small objects. Magnifying glasses have plenty of uses, from making it easier to read a book to examining ...

Convex lenses have a wide range of uses, and are commonly found in: magnifying glasses spectacles for people with long-sight (who can see distant objects clearly but not nearby ones) telescopes ...

Fixing the different problems requires different lenses. Magnifying things close up requires a convex lens. A convex lens bulges. To see things farther away requires a concave lens.