Doctor insights on:
Medicine For Cortical Blindness
Brain vision loss: The eye sends information to the brain (occipital lobe) which computes the image we see as vision. If there is a disturbance to the function of this part of the brain, that is short term and returns to normal, we call it transient cortical blindness. This can be a circulatory problem, due to trauma or to some rare drug side effects. A neurologist can help you sort this out. ...Read more
Vision impairment and blindness are conditions in which a person cannot see well or see at all, even with glasses or contact lenses. If a person's best vision (with correction) out of either eye is only 20/70 - 20/200, he is impaired. If he can see no better than 20/200 or his visual field is no more than 20 degrees (severe "tunnel" vision), ...Read more
A few: Cortical blindness is due to failure of the occipital lobe, the visual information processing center of the brain, to function properly. Many of these occur at birth. The eyes frequently are normal with normal pupillary reaction, yet the patient reports not seeing anything. There are tests of cortical electrical activity (vep) similar to an eeg which can register the lack of activity. ...Read more
Inability to see: Cortical blindness is loss of acuity due to damage to the occipital lobe of the brain. This can be a birth defect or an acquired vascular defect. If at birth, the child will show no recognition of the space around him, the eyes usually will dance (nystagmus) and will not track together. As an adult, the eyes cannot fixate, the pupils usually react to light but no vision will be reported. ...Read more
Brain blindness: The occipital lobe and the optic connections to it allow for the making of images which we call vision. If these tissues are damaged by tumors or strokes, you can lose vision even though the eyes usually are normal. This is called cortical blindness. It sometimes occurs in newborns as a birth defect. ...Read more
Multiple: The back part of your brain, the occipital lobe is what 'sees' images, your eyes are just fancy attenaes transmitting the image to your occipital lobe. If there is anything wrong with the cortex of your occipital lobe, this is cortical blindness. Stroke, migraine, seizures, tumors, all can be problems. ...Read more
Generally none: Cortical blindness results from failure of the brain interconnections to the visual cortex to develop, or damage directly to the cortex from injury and vascular catastrophe. No treatment is possible. Such persons should be entered into programs for the blind and poorly sighted to develop alternate means of coping. ...Read more
Usually reversible: Posterior reversible encephalopathy syndrome (pres) is a syndrome characterized by headache, confusion, seizures and visual loss. There have been reported cases presenting with cortical blindness with near or complete recovery of vision. There are many implicated causes, including ecclampsia, malignant hypertension, tacrolimus and Cyclosporine use, hypercalcemia. Treatment depends on the cause. ...Read more
Blindness after bonk: Transient cortical blindness - the name says it all. This is blindness which is temporary due to injury of the brain (not the eye) following trauma. ...Read more
No: No, breath holding would not result in cortical blindness. ...Read more
Need clarity: Am not clear as to whether you have permanent cortical blindness, or episodic associated with seizure activity. If the former, this could represent permanency, but if paroxysmal, better seizure control is very probable, especially with newer medications, and potentially, a Vagal Nerve Stimulator unit. ...Read more
Cure no, control yes: Control seizures and the cortical blindness will also be controlled. ...Read more
Cortical Blindness: The term refers to a lesion in the occipital cortex of the brain which causes blindness, and implies no damage to the visual apparatus. Post- traumatic means that it is due to a trauma, most likely to the head, which caused the problem. Transient means that is not permanent, and it lasts only for a short period of time. ...Read more
L/R Hemifield: Monocular vision loss is not cortical, but the right (or left) side of the visual field can be impaired (hemianopsia or quadrantanopsia) from a cortical lesion in the occipital lobe of the brain. Physical trauma can be the cause of such brain damage, and in a child would be suggestive of abuse. A CT/MRI is the next test to correlate the visual field with the anatomy. ...Read more
No: You would faint doing this prior to any damage to your brain. Why would you try this anyway unless you have a fetish involvement in breath control which is in fact a dangerous activity.? ...Read more
My 6 yr old boy is suffering from cortical blindness with seizures. Are there any cures for seizures?
Control: There are medications available to control seizures that are widely used. There are implants to control severe problems. Cures however may not be possible. You should have him seen by a pediatric neurologist. ...Read more
Some are illicit: Methanol can cause blindness, and anti-tb drugs like Ethambutol & rifampin. Steroids can cause glaucoma, antimalarials like Hydroxychloroquine can damage the macula. Talc retinopathy can occur with intravenous drug use. Direct retinal toxicity can occur from injected gentamicin. The precautionary principle demands withdrawal of potentially toxic drugs once diminished visual function is documented. ...Read more
Powders & Potions: Wood alcohol (methanol) can contaminate moonshine whiskey and lead to rapid, permanent vision loss. Tobacco-alcohol amblyopia is a vitamin deficiency that may be partially reversible. Talc powder, as a contaminant of intravenous drugs, can cause capillary occlusion in the retina. Marijuana and hallucinogens alter the visual experience, but do not cause vision loss. Mj is good for glaucoma. ...Read more
Not aware of any studies that have looked into this, and I know of no personal cases myself.
Hallucinogenic drugs alter sences and perceptions beyond just sight. And with any of these drugs effects can be unpredictable from one use to the next. ...Read more
Some forms of color blindness are irreversible.
Seek help. ...Read more
Ketamine: No- have not heard of this.Get a more detailed answer ›
Not yet: But see the ted talk where someone with achromatopsia used sound to interpret color. ...Read more
My sister was in a 'induced coma' for 12 days for drug overdose/liver-failure 6 years ago. After she woke she went permanently blind to this day, why?
Liver failure: It's hard to say without knowing all the facts, but my guess is that she overdosed on tylenol (acetaminophen) and developed acute liver failure. When that happens, patients can develop cerebral edema and elevated intracranial pressure which can cause all sorts of neurologic impairments including blindness. ...Read more
Hi, I was interested in changing careers to medicine, but I'm legally blind. Is a medical career still an option?
Medical career: If there is a will, there is a way. ...Read more
I've got dry eyes due to stevens johnson syndrome (drug-allergic).Will this dryness leads to blindness?
Not likely: Stevens-johnson syndrome targets the anterior surface ; mucous membrane of the eye which can result in severe dryness. This can be treated with artificial tears. Sjs can also damage the cornea ; corneal stem cells resulting in scarring of the cornea. It is the corneal changes that may decrease the vision. You should follow closely with your eye doctor for management to prevent vision loss. ...Read more
Loss of vision reflects the inability to perceive images. Such a phenotype can be due to occlusive or barriers to light (e.g. cataracts) through retinal alterations (e.g. wet macular degeneration) to optic nerve lesions (e.g. from a pituitary adenoma) to central nervous system ...Read more
The occipital lobe and the optic connections to it allow for the making of images which we call vision. If these tissues are damaged by tumors or strokes, you can lose vision even though the eyes usually are normal. This is called cortical blindness. It sometimes occurs in newborns ...Read more