2023年3月19日 · Bitemporal quadrantanopia affects the upper or lower quadrants farthest from your nose and closest to your temples. Another term for a homonymous superior quadrantanopia is “pie in the sky” quadrantanopia. Another term for loss of vision in the lower quadrants is “pie on the floor” quadrantanopia.

Contralateral homonymous superior quadrantanopia often called pie in the sky is seen when a mass lesion is in the temporal lobe. It represents damage to the inferior optic radiating fibers (Meyer’s loop).

Bitemporal (either inferior or superior) quadrantanopia affects either the upper or lower outer visual quadrants in both eyes. [citation needed] Individuals with quadrantanopia often modify their behavior to compensate for the disorder, such as tilting of the head to bring the affected visual field into view. [7] .

2008年10月15日 · O.S. left, O.D. right. Note that the defect in the right (asymptomatic) eye strongly respects the vertical midline. This is considered a bitemporal visual field defect despite the extension into the superior nasal quadrant in the left field.

Bitemporal (either inferior or superior) quadrantanopia affects either the upper or lower outer visual quadrants in both eyes. The optic nerve is the output of the retina. Therefore, each optic nerve carries all of the visual information from the eye from which it emerges.

2020年11月29日 · At the optic chiasm, fibres from the nasal half of the retina, corresponding to the temporal visual field, decussate. Lesions compressing the chiasm, such as pituitary adenomas, therefore cause bitemporal hemianopia. Lesions to optic radiations result in homonymous contralateral quadrantanopia.

quadrantanopia, inferior. 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. Syn. ‘pie on the floor’ defect. quadrantanopia, superior

Quadrantanopia is a specific type of visual field loss that affects one quarter of the visual field in each eye. This condition can significantly impact an individual's quality of life, making it crucial to understand its causes, symptoms, diagnosis, and treatment options.

Binasal quadrantanopia is a rare type of visual field defect characteristic of vision loss in either the upper or lower quadrants of both nasal visual fields. The affected individuals often exhibit impairments in peripheral vision, leading to difficulties in various daily activities such as navigation, object recognition, and hazard avoidance.

2024年2月26日 · Differential diagnosis of visual impairment includes optic neuritis, ischemic optic neuropathy, optic nerve compression and cortical lesions. Evaluation by a neurologist is essential for accurate diagnosis and management.