Visual receptive filed is a particular is the region where the light source triggers action potentials in the visual responsive unit, which send information to the brain.
The four types of cells with visual receptive fields are,
• Photoreceptors
• Retinal ganglionic cells
• Lateral geniculate neurons
• Cortical neurons
Thus, the blanks can be filled with photoreceptors, retinal ganglionic cells, lateral geniculate neurons, cortical neurons.