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The large size of RFs in retinal ganglion cells at the periphery
Is useful in allowing better detection of light in daylight conditions
Allows better detection of wavelength-sensitivity differences
Is useful in allowing better detection of sources of low light levels
Allows better detection of flickering light
Allows better discrimination of colour
Cones are better at signalling a flickering stimulus because:
their response is slow and longer-lasting.
they respond only to axial light rays.
they respond only at night.
they are present only at the fovea.
their response is fast and is over quickly.
Retinal ganglion cells (RGCs) with OFF centre receptive fields (RFs):
are never inhibited by light anywhere across the retina.
are excited by light in the RF surround and inhibited by light in the RF centre.
are excited by input from cones and inhibited by input from rods.
are excited by light in the RF centre and in the RF surround.
are excited by light in the RF centre and inhibited by light in the RF surround.
The size of the receptive field of RGCs:
is greatest at the fovea where visual acuity is highest.
is smallest at the optic disk where there are few rod photoreceptors.
reflects the number of cyclic GMP molecules broken down by light.
reflects the amount of convergence from photoreceptors to RGCs.
is affected by the power of accommodation which, in turn, decreases with age.