Final answer:
The left optic tract contains the retinal fibers from the medial side of each retina, which cross over to the right side of the brain. The lateral side retinal fibers project back to the same side of the brain. This arrangement enables processing of the left visual field in the right side of the brain.
Step-by-step explanation:
The left optic tract contains the retinal fibers that originate from the medial side of the retina in each eye. These fibers cross over at the optic chiasm and project to the right side of the brain. On the other hand, the lateral side retinal fibers do not decussate and project back to the same side of the brain. Therefore, the left visual field of each eye is processed in the right side of the brain.