quadrantanopia
Visual quarter loss
Quadrantanopia is loss of vision in one quarter of the visual field, typically affecting the same quadrant in both eyes.
The condition results from damage to specific parts of the brain's visual pathways, often from stroke or tumor.
Also called quadrantanopsia.
The patient's quadrantanopia made reading difficult, as words disappeared into the blind spot.
Observable region at once
- occipital lobePosterior brain vision area
- visual cortexBrain's sight-processing region
- cerebral cortexBrain's outer neural sheet
- parietal lobeCortical region for sensation
temporal lobe · hemisphere · superior · inferior · nasal · temporal
Sudden brain blood blockage
- lesionArea of pathological change
- brain injuryDamage to cranial organ
- tumorAbnormal tissue mass
- gliomaNeoplasm of neural support cells
infarct · hemorrhage · aneurysm · traumatic brain injury · abscess · metastasis · ischemia · embolism
Visual field assessment
Higher in rank
- inferiorOf lower rank
- congruousFitting together suitably
- incongruousNot fitting together harmoniously
- bilateralInvolving two parties
unilateral · pie in the sky · checkerboard pattern · partial · complete · acquired · congenital · progressive
visual field
Observable region at once
- occipital lobePosterior brain vision area
- visual cortexBrain's sight-processing region
- cerebral cortexBrain's outer neural sheet
parietal lobe · temporal lobe · hemisphere · superior · inferior · nasal · temporal
stroke
Sudden brain blood blockage
- lesionArea of pathological change
- brain injuryDamage to cranial organ
- tumorAbnormal tissue mass
glioma · infarct · hemorrhage · aneurysm · traumatic brain injury · abscess · metastasis · ischemia · embolism · thrombosis
perimetry
Visual field assessment
superior
Higher in rank
- inferiorOf lower rank
- congruousFitting together suitably
- incongruousNot fitting together harmoniously
bilateral · unilateral · pie in the sky · checkerboard pattern · partial · complete · acquired · congenital · progressive · static
hemianopia
Blindness in half-field
- scotomaLocalized vision absence
- tunnel visionInability to see periphery
- visionsharp, eye, visual perception, sight, eyes
- perimetryperimetry, peripheral vision, blind spot test, false positive, false positives