The eyes‘ adaptation to darkness is a long process which can take up to 30 minutes. However, the mesopic vision test of the Binoptometer® 4P is performed under mesopic light, i.e. twilight conditions, so partial dark adaptation is sufficient. Usually ...

In addition to its well-known capacity for light and dark adaptation the eye also adapts to colour (colour adaptation or chromatic adaptation). For example, a white sheet of paper always has the same white appearance regardless of whether we look ...