A flower is the reproductive unit of an angiosperm plant. There is an enormous variety of flowers, but all have some characteristics in common. The definitive characteristic of the angiosperms is the enclosed ovary, which contains and protects the developing seeds.
A lesion to the optic tract on the right would cause this visual field defect. Left homonymous superior quadrantanopia (Pie in the SKY) A lesion to the right temporal lobe would cause this visual field defect. Left homonymous inferior quadrantanopia (Pie in the FLOOR) A lesion to the right parietal lobe would cause this visual field defect. Macula. A lesion in the visual cortex causes visual field defects similar to that of other lesion, with the exception of sparing of this portion.
Therefore, damage to the right side of the posterior portion of the brain can cause a loss of the left field of view in both eyes. Likewise, damage to the left posterior part of the brain can cause a loss of the right field of vision. The most common causes of this damage include stroke, brain tumour and trauma. These are the visual fields of a patient with a right-sided hemianopia tested on a machine called a Humphrey Field Analyser.