eye-readable

adj. visually recognizable and understandable without the intervention of a tool or a machine

Notes

Although microfilm is generally not considered eye-readable because it requires magnification, some people consider it essentially eye-readable because the necessary equipment (a magnifying lens and a source of light) is uncomplicated and common. Microfilm, however, often employs eye-readable characters on opening targets to help users identify the contents of a reel without loading it in a reader.