Patent attributes
A system and method determines an optimum size for a font for readability. A method determines font characteristics by determining a character density for the font and multiplying the character density by a sharpest focusable area of the viewing medium. The method further includes varying the character density according to a range in a number of clusters per fixation to determine a maximum font size and a minimum font size. In an embodiment, the character density is a ratio of a number of clusters per em in the font to a number of visible clusters within a predetermined foveal angle. The predetermined foveal angle can be a field of vision for sharpest focus of an eye or a reader specific foveal angle that reflects the reader's visual acuity, taking into consideration macular degeneration, vision impairments, vision sharpness, tunnel vision, eye disease, near sightedness, far sightedness, dyslexia, and astigmatism.
