The visual system serves various functions, four of which are critical in the context of designing apps for older adults: Visual acuity is the ability to see fine details of objects such as text, icons and buttons in apps for older adults. Contrast sensitivity is the ability to discriminate between different brightness levels. Color perception is the ability to distinguish between different colors in and around text, icons, buttons, etc. Usable visual field is the ability to use the whole of the visual field to perceive detail in the area being looked at and the surrounding area. In this article… Continue Reading Understanding Recommended Color Contrast