The difference in the peak sensitivity of the scotopic and photopic vision in dark adaptation. In a scotopic system, a stimulus of 507 nanometers is perceived brighter than other stimuli, while the photopic system has 555 nanometers perceived as brighter than other stimuli. The effect is cone vision predominance in bright light and rod vision predominance in dim light.

Also Known As

  • Purkinje Effect
  • Purkinje Phenomenon