Video magnifiers are electronic devices that use a camera, LCD screen, lenses and/or digital magnification.

They are designed to be mostly used by people with vision that can no longer be help using a conventional magnifying glass. The benefit of a video magnifier is that it allows greater magnification

Magnification

Magnification is the process of enlarging something only in appearance, not in physical size. This enlargement is quantified by a calculated number also called "magnification"...

whilst also offering great field of view. Typically these types of magnifiers start at around 7 times but can reach 50 times or more.