Neurological conditions can affect your eyes and vision and have a big impact on your daily life. Your eyes receive visual information, but it’s actually your brain that interprets the information and allows you to ‘see’ the image. Your brain also controls your eye movements and focus.
A neuro-ophthalmologist performs comprehensive examinations to diagnose and treat a range of conditions that can affect the brain and nervous system. Some of these are listed below.
If you have any of the following symptoms, have your eyes checked by an optometrist or GP:
At the first visit, your neuro-ophthalmologist will conduct a comprehensive examination, which may take more than an hour. The aim is to obtain a detailed history of your problem, any relevant medical conditions, and to conduct neurological and eye tests. If you have had recent CT scans or MRI, please bring your films along.
Depending on your condition, eye drops may be used to dilate your pupils during the examination.
A range of test may be conducted to assess your:
Vision and visual fields will be checked for each eye. You may be asked to look at an object and describe any missing or blurry areas. A common way to test your peripheral vision is to get you to focus on a target in front of you while a light flashes at your side. One eye is tested at a time and you press a button every time you see the flash.
An ophthalmoscope exam allows your neuro-ophthalmologist to quickly assess the internal structures of your eye, including the optic nerve. More detailed studies may also be performed, such as an optical coherence tomography (OCT) scan.
You may need to have blood tests to check for an underlying medical condition, such as diabetes, high blood pressure, a stroke or a neurological condition (e.g. myasthenia gravis).
A CT or MRI scan may be able to detect a structural cause for your symptoms. An MRI of the brain is often used to check for multiple sclerosis. Sometimes, a lumbar puncture (spinal tap) is required to assess if an infection or inflammation has caused elevated pressure in your brain (e.g. with idiopathic intracranial hypertension).
The treatment recommended by your neuro-ophthalmologist will depend on your specific condition.
Some recovery may be possible after a stroke. Recovery after the removal of a brain tumour depends on the initial vision loss and the extent of the surgery. Visual field deficits due to inflammation may resolve spontaneously or with medication.
Double vision may also resolve by itself. An eye patch is sometimes used to reduce the occurrence of double vision. If it is a permanent problem, surgery may be suggested.
Vision loss due to optic neuritis usually reverses within 3 months. If appropriate, your neuro-ophthalmologist may prescribe medication to try and reduce the risk of developing multiple sclerosis, which is often associated with optic neuritis.
Idiopathic intracranial hypertension may require surgery to relieve pressure on the brain. If recent weight gain has contributed to the condition, a weight-loss program may also be advised.