Cortical blindness: Difference between revisions
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{{Infobox medical condition | |||
| name = Cortical blindness | |||
| synonyms = Cerebral blindness | |||
| field = [[Neurology]] | |||
| symptoms = Loss of vision, [[visual field]] defects | |||
| complications = [[Anton–Babinski syndrome]] | |||
| onset = Sudden or gradual | |||
| duration = Variable | |||
| causes = [[Stroke]], [[traumatic brain injury]], [[infections]], [[tumors]] | |||
| risks = [[Hypertension]], [[diabetes]], [[atherosclerosis]] | |||
| diagnosis = [[Neuroimaging]], [[visual evoked potential]] | |||
| differential = [[Retinal detachment]], [[optic neuritis]], [[glaucoma]] | |||
| treatment = [[Rehabilitation]], [[occupational therapy]] | |||
| prognosis = Variable, depends on cause and extent of damage | |||
| frequency = Rare | |||
}} | |||
'''Cortical blindness''' is a form of [[visual impairment]] that results from damage to the [[occipital lobe]] of the brain, which is responsible for processing visual information. This condition is different from other forms of blindness, as the eyes themselves are physically capable of seeing, but the brain is unable to interpret the visual information it receives. | '''Cortical blindness''' is a form of [[visual impairment]] that results from damage to the [[occipital lobe]] of the brain, which is responsible for processing visual information. This condition is different from other forms of blindness, as the eyes themselves are physically capable of seeing, but the brain is unable to interpret the visual information it receives. | ||
==Causes== | ==Causes== | ||
Cortical blindness can be caused by a variety of conditions, including [[stroke]], [[traumatic brain injury]], [[brain tumor]], and [[infections]] of the brain. It can also be a result of [[hypoxia]] or lack of oxygen to the brain, which can occur during a cardiac arrest or a complicated childbirth. | Cortical blindness can be caused by a variety of conditions, including [[stroke]], [[traumatic brain injury]], [[brain tumor]], and [[infections]] of the brain. It can also be a result of [[hypoxia]] or lack of oxygen to the brain, which can occur during a cardiac arrest or a complicated childbirth. | ||
==Symptoms== | ==Symptoms== | ||
People with cortical blindness may experience a complete loss of visual perception, or they may have some residual vision. They may also experience [[visual hallucinations]], a phenomenon known as [[Charles Bonnet Syndrome]]. Other symptoms can include difficulty with depth perception, difficulty recognizing faces or objects, and problems with spatial orientation. | People with cortical blindness may experience a complete loss of visual perception, or they may have some residual vision. They may also experience [[visual hallucinations]], a phenomenon known as [[Charles Bonnet Syndrome]]. Other symptoms can include difficulty with depth perception, difficulty recognizing faces or objects, and problems with spatial orientation. | ||
==Diagnosis== | ==Diagnosis== | ||
Diagnosis of cortical blindness is typically made through a combination of clinical examination and imaging studies, such as [[MRI]] or [[CT scan]]. The patient's history and symptoms are also taken into account. | Diagnosis of cortical blindness is typically made through a combination of clinical examination and imaging studies, such as [[MRI]] or [[CT scan]]. The patient's history and symptoms are also taken into account. | ||
==Treatment== | ==Treatment== | ||
There is currently no cure for cortical blindness. Treatment is focused on managing symptoms and helping the individual adapt to their visual impairment. This may involve the use of assistive devices, occupational therapy, and other forms of rehabilitation. | There is currently no cure for cortical blindness. Treatment is focused on managing symptoms and helping the individual adapt to their visual impairment. This may involve the use of assistive devices, occupational therapy, and other forms of rehabilitation. | ||
==Prognosis== | ==Prognosis== | ||
The prognosis for cortical blindness depends on the underlying cause. In some cases, partial recovery may be possible, particularly if the cause of the blindness is treatable. | The prognosis for cortical blindness depends on the underlying cause. In some cases, partial recovery may be possible, particularly if the cause of the blindness is treatable. | ||
==See also== | ==See also== | ||
* [[Visual impairment]] | * [[Visual impairment]] | ||
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* [[Hypoxia]] | * [[Hypoxia]] | ||
* [[Charles Bonnet Syndrome]] | * [[Charles Bonnet Syndrome]] | ||
[[Category:Neurological disorders]] | [[Category:Neurological disorders]] | ||
[[Category:Visual impairment]] | [[Category:Visual impairment]] | ||
[[Category:Blindness]] | [[Category:Blindness]] | ||
{{stub}} | {{stub}} | ||
{{No image}} | {{No image}} | ||
Latest revision as of 04:38, 4 April 2025
| Cortical blindness | |
|---|---|
| Synonyms | Cerebral blindness |
| Pronounce | N/A |
| Specialty | N/A |
| Symptoms | Loss of vision, visual field defects |
| Complications | Anton–Babinski syndrome |
| Onset | Sudden or gradual |
| Duration | Variable |
| Types | N/A |
| Causes | Stroke, traumatic brain injury, infections, tumors |
| Risks | Hypertension, diabetes, atherosclerosis |
| Diagnosis | Neuroimaging, visual evoked potential |
| Differential diagnosis | Retinal detachment, optic neuritis, glaucoma |
| Prevention | N/A |
| Treatment | Rehabilitation, occupational therapy |
| Medication | N/A |
| Prognosis | Variable, depends on cause and extent of damage |
| Frequency | Rare |
| Deaths | N/A |
Cortical blindness is a form of visual impairment that results from damage to the occipital lobe of the brain, which is responsible for processing visual information. This condition is different from other forms of blindness, as the eyes themselves are physically capable of seeing, but the brain is unable to interpret the visual information it receives.
Causes[edit]
Cortical blindness can be caused by a variety of conditions, including stroke, traumatic brain injury, brain tumor, and infections of the brain. It can also be a result of hypoxia or lack of oxygen to the brain, which can occur during a cardiac arrest or a complicated childbirth.
Symptoms[edit]
People with cortical blindness may experience a complete loss of visual perception, or they may have some residual vision. They may also experience visual hallucinations, a phenomenon known as Charles Bonnet Syndrome. Other symptoms can include difficulty with depth perception, difficulty recognizing faces or objects, and problems with spatial orientation.
Diagnosis[edit]
Diagnosis of cortical blindness is typically made through a combination of clinical examination and imaging studies, such as MRI or CT scan. The patient's history and symptoms are also taken into account.
Treatment[edit]
There is currently no cure for cortical blindness. Treatment is focused on managing symptoms and helping the individual adapt to their visual impairment. This may involve the use of assistive devices, occupational therapy, and other forms of rehabilitation.
Prognosis[edit]
The prognosis for cortical blindness depends on the underlying cause. In some cases, partial recovery may be possible, particularly if the cause of the blindness is treatable.
