Search results
Results from the WOW.Com Content Network
Bitemporal hemianopsia. Bitemporal hemianopsia is the medical description of a type of partial blindness where vision is missing in the outer half of both the right and left visual field. It is usually associated with lesions of the optic chiasm, the area where the optic nerves from the right and left eyes cross near the pituitary gland.
Paris as seen with bitemporal hemianopsia. A heteronymous hemianopsia is the loss of half of the visual field on different sides in both eyes. It is separated into two categories: Binasal hemianopsia – the loss of the fields surrounding the nose; Bitemporal hemianopsia – the loss of the fields closest to the temples.
Binasal hemianopsia is the medical description of a type of partial blindness where vision is missing in the inner half of both the right and left visual field. It is associated with certain lesions of the eye and of the central nervous system , such as congenital hydrocephalus .
Aneurysms of the anterior communicating artery are the most common circle of Willis aneurysm [4] and can cause visual field defects such as bitemporal heteronymous hemianopsia (due to compression of the optic chiasm), [5] psychopathology and frontal lobe pathology.
Quadrantanopia, quadrantanopsia, refers to an anopia (loss of vision) affecting a quarter of the visual field . It can be associated with a lesion of an optic radiation. [ 1] While quadrantanopia can be caused by lesions in the temporal and parietal lobes of the brain, it is most commonly associated with lesions in the occipital lobe.
Magnetic resonance imaging. Hemianopsia, or hemianopia, is a visual field loss on the left or right side of the vertical midline. It can affect one eye but usually affects both eyes. Homonymous hemianopsia(or homonymous hemianopia) is hemianopic visual field loss on the same side of both eyes. Homonymous hemianopsia occurs because the right ...
Visual field-bitemporal hemianopia Visual field-binasal hemianopia. A lesion involving complete optic chiasm, which disrupts the axons from the nasal field of both eyes, causes loss of vision of the right half of the right visual field and the left half of the left visual field. [3] This visual field defect is called as bitemporal hemianopia.
Anopsia. Scheme showing central connections of the optic nerves and optic tracts. (Lesions at different locations relate to different types of anopsias.) An anopsia (from Ancient Greek ἀν- (an-) 'without' and ὄψις (opsis) 'sight') is a defect in the visual field. If the defect is only partial, then the portion of the field with the ...