hemianopia
Half visual field
Hemianopia is blindness in half the visual field of one or both eyes.
The condition typically results from stroke, brain tumor, or other neurological damage affecting the visual pathways.
A person with hemianopia might see nothing to their left or right while retaining normal vision in the remaining field: After the stroke, her left hemianopia made reading difficult.
Blindness in visual quarter
- congruousFitting together suitably
- incongruousNot fitting together harmoniously
Visual field assessment
- scotomaLocalized vision absence
- visual field defectGap in what eyes perceive
- visual acuityClarity of eyesight
- neuroimagingVisualizing nervous system structure
Observable region at once
- visual cortexBrain's sight-processing region
- occipital lobePosterior brain vision area
- cerebral cortexBrain's outer neural sheet
- optic nerveRetina-brain neural connection
Uncorrectable seeing deficit
- collision riskDanger of objects colliding
- spatial awarenessSense of physical positioning
- blind sideUnprotected angle of perception
- scanningSystematic visual examination
Sudden brain blood blockage
- tumorAbnormal tissue mass
- traumatic brain injuryBrain damage from external force
- ischemiaInsufficient tissue blood supply
- hemorrhageProfuse discharge of blood
aneurysm · glioma · infarction · meningioma · demyelination · multiple sclerosis · neurosurgery · craniotomy
Restoring practical life abilities
- neuroplasticityBrain's self-rewiring ability
- vision therapyExercises improving eye function
- reading aidsTools improving text visibility
- mobility trainingExercises enhancing joint freedom
quadrantanopia
Blindness in visual quarter
- congruousFitting together suitably
- incongruousNot fitting together harmoniously
perimetry
Visual field assessment
- scotomaLocalized vision absence
- visual field defectGap in what eyes perceive
- visual acuityClarity of eyesight
visual field
Observable region at once
- visual cortexBrain's sight-processing region
- occipital lobePosterior brain vision area
- cerebral cortexBrain's outer neural sheet
visual impairment
Uncorrectable seeing deficit
- collision riskDanger of objects colliding
- spatial awarenessSense of physical positioning
- blind sideUnprotected angle of perception
reading difficulty · scanning · adaptation · partial blindness
stroke
Sudden brain blood blockage
- tumorAbnormal tissue mass
- traumatic brain injuryBrain damage from external force
- ischemiaInsufficient tissue blood supply
hemorrhage · aneurysm · glioma · infarction · meningioma · demyelination · multiple sclerosis · neurosurgery · craniotomy
occupational therapy
Restoring practical life abilities
- neuroplasticityBrain's self-rewiring ability
- vision therapyExercises improving eye function
- reading aidsTools improving text visibility