The visual inspection is conducted by inspecting the item using the instrumentation and optical devices. It is applied at all production and operation stages in all fields.

The objective of the visually-optical inspection is to establish the numerical values conformity of the controlled parameters to the regulatory requirements and detect such defects as cracks, cuts, dents, inclusions, etc. The visually-optical inspection elements are present in any nondestructive and destructive test method. This inspection is basic and applied before the other test methods.