Which lesion causes homonymous hemianopia?
Any type of intracranial lesion in the appropriate location can cause a homonymous hemianopia; however, vascular causes (cerebral infarction and intracranial hemorrhage) are the most frequent in adults, ranging from 42 to 89 percent, followed by brain tumors, trauma, surgical interventions, and other central nervous …
What causes contralateral homonymous hemianopia?
Causes. Homonymous hemianopsia can be congenital, but is usually caused by brain injury such as from stroke, trauma, tumors, infection, or following surgery. Vascular and neoplastic (malignant or benign tumours) lesions from the optic tract, to visual cortex can cause a contralateral homonymous hemianopsia.
Is homonymous hemianopia ipsilateral or contralateral?
 HH can also be characterized as contralateral hemianopsia (unilateral involvement at the optic tract, lateral geniculate nucleus, optic radiations, or occipital cortex opposite to the side of field loss) in contrast to bitemporal hemianopsia (involvement at the optic chiasm).
Where is lesion for homonymous hemianopia?
The most common location of lesions resulting in HH is the occipital lobe (45%), followed by damage to the optic radiations (32%). The remainder is caused by lesions of the optic tract (10%), lateral geniculate nucleus (LGN) (1.3%), or a combination of several areas (11%).