Damage of the retina results in loss of vision in only one eye. Damage to the optic tract causes loss of the contralateral visual field. So if the left optic tract is damaged, there will be a loss of vision of the right visual field. Damage to the optic chiasm compromises the nasal retina ganglion cells. This leads to loss of vision in both eyes because the brain does not receive information of the nasal parts of the retina. Lateral vision is impaired.

Loss of vision of one side of the visual field. The nasal part of the retina of one eye and the temporal part of the retina of the other eye overlap and are both impaired.

Damage of the optic chiasm can cause this. The nasal retina representation is impaired so no overlap of visual fields is possible. Vision is entirely monocular. The most lateral parts of the visual field only can be perceived by the nasal retina, so this is not perceivable with this condition.