Scotopic curve

A scotopic curve is a diagram showing that, at low levels of light, where determining colour differences is difficult, the strongest response of the human eye moves towards blue and violet end of the visible spectrum with less sensitivity towards the red when compared with a photopic curve.

  • Whilst a  scotopic curve describes the response of the human eye to low levels of light a photopic curve is a diagram showing that, in bright light, the strongest response of the human eye is to the colour green with less sensitivity towards the spectral extremes of red and violet.
Related diagrams

Each diagram below can be viewed on its own page with a full explanation.

References