What is left homonymous hemianopia with macular sparing?
Patients with homonymous hemianopia sometimes show preservation of the central visual fields, ranging up to 10°. This phenomenon, known as macular sparing, has sparked perpetual controversy.
What causes macular sparing?
Macular sparing may be caused by collateral vascular supply to the macular region or by the very large macular representation in the occipital cortex; additionally, bilateral representation of macular vision has been suspected.
What does macular sparing look like?
Macular sparing is visual field loss that preserves vision in the center of the visual field, otherwise known as the macula. It appears in people with damage to one hemisphere of their visual cortex, and occurs simultaneously with bilateral homonymous hemianopia or homonymous quadrantanopia.
Can homonymous hemianopia be cured?
In some cases, hemianopia resolves on its own within a few months. While hemianopia can be permanent, several treatment options can help you adapt to reduced vision.
Can homonymous hemianopia get worse?
In some cases, hemianopia resolves on its own within a few months. While hemianopia can be permanent, several treatment options can help you adapt to reduced vision. Work with your doctor to figure out the best treatment plan to help improve your vision.
When does homonymous hemianopia occur?
The most common visual deficit in hemiplegic patients is homonymous hemianopsia,104 which occurs when an infarction involves the optic tract, the lateral geniculate body, or the optic radiation to one occipital cortex.
What impairment would you expect to see in an individual with damage to their primary visual cortex?
Destruction of the primary visual cortex leads to blindness in the part of the visual field that corresponds to the damaged cortical representation. The area of blindness – known as a scotoma – is in the visual field opposite the damaged hemisphere and can vary from a small area up to the entire hemifield.