What are the causes of monocular diplopia?
Monocular diplopia is double vision that occurs only in one eye or only when one eye is open. Common causes of monocular double vision include refractive error, a change in the shape of the eye, which causes vision to become distorted, or the early stages of a cataract, a clouding of the eye’s lens.
What are the causes of Polyopia?
In palinoptic polyopia, movement causes each polyopic image to leave an image in its wake, creating hundreds of persistent images (entomopia). Infarctions, tumors, multiple sclerosis, trauma, encephalitis, migraines, and seizures have been reported to cause cerebral polyopia.
Can eye movement cause seizures?
Epileptic nystagmus (EN) is defined as a quick, repetitive jerky movement of the eyeball associated with seizure activity [2]. Because EN is a rare accompanying phenomenon of epilepsy, fewer than 50 cases of EN have been reported [3].
Can strabismus cause seizures?
Abstract. Ictal strabismus, sometimes associated with epileptic nystagmus, is an extremely rare epileptic phenomenon, suggestive of cortical involvement in monocular eye movement control.
What is monocular polyopia?
Polyopia, or the seeing of multiple images on focusing on one object, is a relatively uncommon condition. This optical illusion is allied to that of monocular diplopia, or the seeing of two images with one eye.
What is the meaning of polyopia?
[ pŏl′ē-ō′pē-ə ] n. The perception of several visual images of one object. multiple vision.
What is a focal seizure?
Focal seizures, also called focal seizures, begin in one area of the brain, but can become generalized and spread to other areas. For seizures of all kinds, the most common treatment is medication. The doctor may also recommend diet therapy, nerve stimulation or surgery, depending on the seizures’ characteristics.
Can astigmatism cause Polyopia?
Point Spread Function With Astigmatism Further defocus results in a multimodal intensity distribution and potential diplopia or polyopia (Figure 13, bottom). Note that while spherical defocus can result in diplopia with a line target, astigmatism can produce diplopia with even a point.
What are the causes of cerebral polyopia?
Cerebral polyopia may result from a variety of cerebral injuries including but not limited to trauma, ischemic stroke, migraine, encephalitis, seizures, tumors, and multiple sclerosis . Most of the cases of cerebral polyopia have been described to be associated with visual field deficits and are thought to localize to the occipital lobe.
What is the difference between monocular diplopia and polyopia?
In monocular diplopia, the double vision persists when the good eye is covered and disappears when the affected eye is covered. If double vision persists when either eye is covered, one should consider the presence of cerebral polyopia. Psychogenic diplopia due to inorganic causes should always be a diagnosis of exclusion.
What causes diplopia in humans?
Diplopia can occur during monocular viewing (monocular diplopia) or binocular viewing (binocular diplopia). Monocular diplopia occurs when two images are viewed by a single eye. Monocular diplopia can result from three conditions; light diffraction, metamorphopsia and cerebral polyopia.
What is polyopia of the cerebral cortex?
Cerebral polyopia is the perception of multiple images due to pathologies in occipital cortex or central visual pathway lesions. Monocular diplopia occurs bilaterally, the images are of equal clarity and do not overlap.2 Open in a separate window Figure 1. Monocular diplopia due to light diffraction resolved with pinhole