Aim To investigate changes in colour discrimination as a result of chronic hypoxic exposure induced by extreme altitudes (above 8000 m) during an expedition to Mt Everest. Methods Colour ...

Scott County has a weekend of options to celebrate the nation’s 250th anniversary of independence.

Saturday is the Virginia State Parks 89th anniversary, and Natural Tunnel State Park will celebrate it in a cave.

Chromatic axes of modulation are shown as circles (tritan), squares (protan), and triangles (deutan). Upper limit of normal is 10% for all three chromatic axes. Fluctuations in threshold occurs in ...