<P> Rods can not distinguish colours , but are responsible for low - light ( scotopic ) monochrome ( black - and - white ) vision ; they work well in dim light as they contain a pigment , rhodopsin ( visual purple ) , which is sensitive at low light intensity , but saturates at higher ( photopic ) intensities . Rods are distributed throughout the retina but there are none at the fovea and none at the blind spot . Rod density is greater in the peripheral retina than in the central retina . </P>
<P> Rods can not distinguish colours , but are responsible for low - light ( scotopic ) monochrome ( black - and - white ) vision ; they work well in dim light as they contain a pigment , rhodopsin ( visual purple ) , which is sensitive at low light intensity , but saturates at higher ( photopic ) intensities . Rods are distributed throughout the retina but there are none at the fovea and none at the blind spot . Rod density is greater in the peripheral retina than in the central retina . </P>
at which part of eyes there is no sense of vision
at which part of eyes there is no sense of vision
the blind spot
the blind spot