| The brain and the brain stem are the main parts of the CNS and vision is processed at the cerebellum. |
| The brain and the brain stem are the main parts of the CNS and vision is processed at the optic nerve centre. |
| The brain and spinal chord are the main parts of the CNS and vision is processed at the cortex. |
| The brain and spinal chord are the main parts of the CNS and vision is processed at the retina. |
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