A person with convergence insufficiency has trouble getting the eyes to work together to focus on an object, resulting in difficulty with close-up tasks. Researchers do not know what causes the ...

Long sight is corrected using a converging lens which starts to converge light rays from a nearby object before they enter the eye. Converging (convex) lenses are used in reading glasses.

1. Use Converging Verticles To Exaggerate Height. When shooting close to a building with a wide-angle lens, you can exaggerate the height of the structure with the help of converging verticals ...