Pie On The Floor Visual Defect
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Vision loss that involves only one fourth of the visual field in both eyes.
Pie on the floor visual defect. Redirected from pie in the sky defect quadrantanopia quadrantanopsia refers to an anopia affecting a quarter of the field of vision. An inferior homonymous loss of vision in two quarters due to a lesion of the superior fibres of the optic radiations in the parietal lobe on the contralateral side of the visual pathway. It is also commonly referred to as pie on the floor visual defect. If an infarct occurs at the superior division it will affect the upper portion of the optic radiations in the parietal lobe and will give a contralateral inferior quadrantopsia pie on the floor visual defect.
While quadrantanopia can be caused by lesions in the temporal and parietal lobes it is most commonly associated with lesions in the occipital lobe. Pie on the floor visual field parietal lobe lesion anytime the lesion is in both eyes think post chiasmal. Pie on the floor defect. It involves damage to the dorsal optic radiations parietal lobe through trauma or a middle cerebral artery infarction.
Well the visual field defect affects both eyes which tells you that it is behind the optic chiasm. How do you localize a pie in the sky visual field defect. It can be associated with a lesion of an optic radiation.
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