Disappearance of grating induction at scotopic luminances

  title={Disappearance of grating induction at scotopic luminances},
  author={Mark E. McCourt},
  journal={Vision Research},
The dependence of grating induction magnitude on retinal illuminance was examined in two subjects. Grating induction magnitude, as determined using the cancellation technique of McCourt, declines monotonically with decreasing retinal illuminance, effectively disappearing at a value of 0.3-0.5 phot td. In a second experiment, sensitivity differences for test lights of 500 and 600 nm were measured as a function of background illuminance in order to gauge the luminance operating range for grating… CONTINUE READING