What causes contralateral homonymous hemianopia with macular sparing?

Occlusive cerebrovascular disease is the most common cause of homonymous hemianopia (HH) with macular sparing. A paper published in 1951 mentioned that the central visual field (VF) can be bisected and the visual field of the macular area spared.

What is contralateral homonymous hemianopia?

Homonymous hemianopsia is a condition in which a person sees only one side ― right or left ― of the visual world of each eye. The condition results from a problem in brain function rather than a disorder of the eyes themselves.

What part of the brain causes homonymous hemianopia?

Homonymous hemianopsia occurs because the right half of the brain has visual pathways for the left hemifield of both eyes, and the left half of the brain has visual pathways for the right hemifield of both eyes….

Homonymous hemianopsia
Paris as seen with left homonymous hemianopsia
Specialty	Ophthalmology

What is meant by macular sparing?

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.

Is the macula temporal to optic nerve?

The macula is the central 3 mm of the retina. It has intense pigment supplied by the retinal pigment epithelium. The fovea is the central part of the macula. It is located 3-3.5 mm temporal to the temporal edge of the optic nerve head.

What causes left homonymous hemianopsia with macular sparing?

A right occipital lobe infarction causes a left homonymous hemianopsia with macular sparing. Surgery for exotropia with congenital or early-onset homonymous hemianopia is undertaken with caution. First, the realignment of the eyes reduces the total binocular visual field.

What do you need to know about homonymous hemianopia?

Keywords: hemianopia, homonymous hemianopia, visual field defects, visual training, perimetry Introduction Homonymous hemianopia (HH) involves vision loss on the same side of the visual field in both eyes. This type of visual field loss is indicative of a lesion involving the visual pathway posterior to the chiasm.

What causes homonymous hemianopsia in posterior cerebral artery stroke?

Posterior Cerebral Artery Strokes PCA strokes will primarily cause a visual field loss or homonymous hemianopia to the opposite side. This large occipital or PCA stroke causes people to be “blind” on one side of the visual field. This is the most common symptom of a large occipital lesion or PCA stroke.

What does it mean to have macular sparing?

Macular sparing. Macular sparing is visual field loss that preserves vision in the center of the visual field, otherwise known as the macula.

What causes contralateral homonymous hemianopia with macular sparing? Occlusive cerebrovascular disease is the most common cause of homonymous hemianopia (HH) with macular sparing. A paper published in 1951 mentioned that the central visual field (VF) can be bisected and the visual field of the macular area spared. What is contralateral homonymous hemianopia? Homonymous hemianopsia is…