Cortical blindness

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

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

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 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

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

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

• Visual impairment
• Occipital lobe
• Stroke
• Traumatic brain injury
• Brain tumor
• Hypoxia
• Charles Bonnet Syndrome