Abstract
— This experiment determined the maximum useful resolution for a desktop PC display. We assumed that in the absence of limitations attributable to the display, the eye's spatial resolution determined the minimum-size letters that could be recognized. We then introduced a spatial-resolution limit representing the display and increased the size applied to 16 upper-case letters until observers again had difficulty recognizing the letters. The eye and display affected text recognition equally when the size of the just-recognizable letters had to be 1.5× larger than when the display's effect was absent. An analysis of our results indicated that eye's visual acuity and display resolution are of approximate equivalence when a 186-dpi display is viewed at a distance of 46 cm (18 in). Comparable results were observed for three additional stimulus types: text-like nonsense symbols, gray-scale PC computer icons, and the same computer icons with colored features.
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