|Title||Stimulus luminance and the spatial acuity of domestic fowl (Gallus g. domesticus)|
|Authors||Gover, N., Jarvis, J., Abeyesinghe, S.M. and Wathes, C.M.|
The luminance dependence of spatial acuity in domestic fowl was measured directly over stimulus luminances ranging from 0.06 to 57.35 cd m−2. At the highest luminance, acuity was around 6.5 c deg−1, in agreement with previous studies in this species. As stimulus luminance decreased, acuity fell with increasing rate to 3.2 c deg−1 at 0.06 cd m−2, following the same shape as acuity functions for other mammalian and avian species. These findings suggest that the rod–cone transition for domestic fowl is between 0.45 and 1.79 cd m−2. Over the photopic range from 1.79 to 57.35 cd m−2 the change of acuity for fowl was 1%, compared with 32% for humans. For domestic fowl, the Rovamo–Barten MTF model of contrast sensitivity accounted for the behaviour of acuity as a function of luminance down to mesopic levels.
|Journal||Vision Research: an international journal for functional aspects of vision|
|Journal citation||49 (23), pp. 2747-2753|
|Digital Object Identifier (DOI)||doi:10.1016/j.visres.2009.08.011|