Fixation Duration

The length of time the eye remains relatively still on a specific point in a visual display during reading or visual processing. In eye-tracking research, fixation duration is a key metric for measuring cognitive processing load and readability — shorter fixations are associated with easier processing, while longer fixations indicate greater difficulty. For accessibility research, fixation duration helps quantify how different text presentations, simplification strategies, or interface designs affect reading effort for people with disabilities such as dyslexia.