Visual inspection, with or without optical aids, is the original method of NDT. Many defects are surface breaking and can be detected by careful direct visual inspection. Optical aids include low power magnifiers, microscopes, telescopes, and also specialized devices such as horoscopes and other fiber optic devices for the inspection of restricted access areas. These devices can also be used with television camera systems. Much of the success of visual inspection depends on the surface condition and the lighting arrangements. Television camera systems. Much of the success of visual inspection depends on the surface condition and the lighting arrangements