It’s all about fonts

Typographic clarity comes in two flavors: legibility and readability. What’s the difference? Legibility is a function of typeface design. It’s an informal measure of how easy it is to distinguish one letter from another in a particular typeface. Readability, on the other hand, is dependent upon how the typeface is used. Readability is about typography. It is a gauge of how easily words, phrases and blocks of copy can be read. (by Allan Haley)