Preserving food, less fighting for food, less roaming to hunt and gather. More stable sense of community. More children. Preserving food, less fighting for food, less roaming to hunt and gather. More stable sense of community. More children.
Contrast sensitivity is the ability of an imaging process to produce an image of objects or tissues in the body that have relatively small physical differences or inherent contrast. The contrast that is to be imaged is in the form of some specific physical characteristic.
â¢ Measure using a photometer â¢ Contrast is a function of the luminance of an object and the luminance of its background â¢ In dim lighting rods predominate vision â¢ Objects can be seen less if fixated upon â¢ Objects are more visible in peripheral vision â¢ In normal lighting cones predominate vision