About Ocular Migraines
Ocular migraines are a type of migraine that cause temporary visual disturbances. They can occur with or without other migraine symptoms, such as a headache. Ocular migraines are often characterized by temporary vision loss or changes in vision in one eye. Some people may experience blind spots, flashing lights, zigzag lines, or shimmering spots during an ocular migraine episode. The term "ocular migraine" is sometimes used interchangeably with "retinal migraine," but they may be different conditions. Retinal migraines specifically cause partial or full vision loss in one eye, usually accompanied by a headache within 60 minutes of the vision loss.
It's important to note that the term "ocular migraine," may not be commonly used in the medical community. It is not officially recognized as a distinct type of migraine by medical headache specialty groups such as the International Headache Society.
The exact causes of ocular migraines are not fully understood. Researchers believe that reduced blood flow or blood vessel spasms in the area behind the eye, as well as abnormal electrical activity in the brain, may contribute to the development of ocular migraines.
Non-modifiable (things that cannot be changed) risk factors for ocular migraines include:
- Personal or family history of migraines
- Being assigned female at birth
- Age between 30 and 39 years old
Modifiable risk factors for ocular migraines include:
- Eyestrain
- Stress
- Smoking
- Hormonal changes
- High blood pressure
- Physical exertion
- High altitude
- Dehydration
- Low blood sugar
- Excessive heat exposure
It's important to note that these risk factors may vary from person to person, and individual experiences may differ. It's always a good idea to consult with a healthcare professional for personalized advice and guidance.
The most common early symptoms of ocular migraines include:
- Seeing temporary flashes of stars, zig-zag lines, or other patterns
- A bright or blind spot that starts in the center of vision and spreads to cover up to half of the visual field of one eye
- Sensitivity to light and sound
If you have sudden changes in vision, weakness or numbness on one side of your body or face, difficulty speaking, difficulty with coordination or vertigo (feeling like you are spinning), you should get immediate medical attention as these may be the signs of a stroke.
It's important to note that not all individuals will experience all of these symptoms, as ocular migraines can vary widely among individuals. If you are experiencing any of these symptoms, it is recommended to consult with a healthcare professional for an accurate diagnosis and appropriate management.
To diagnose ocular migraines, doctors may perform the following examinations, tests, and procedures:
- Physical exam: A thorough physical examination is conducted, including a neurological assessment to check for any abnormalities in reflexes, strength, and coordination.
- Personal and family health history evaluation: The doctor assesses your personal and family health history, particularly regarding migraines.
- Eye exam: An eye exam is performed to evaluate the health of your eyes and rule out any underlying eye conditions. You may need a dilated eye exam where drops are put into your eye to open the pupil of the eye to allow the doctor to examine the back of the eye.
- Imaging tests: Tests such as CT scan or MRI scan may be ordered to rule out other potential causes of your symptoms, such as stroke.
Based on the initial examinations and tests, additional specialized examinations, like magnetic resonance imaging (MRI), tomography, electroencephalogram (EEG), and lumbar puncture may be performed to gather more detailed information about your condition.
It's important to note that there is no specific test available to identify ocular migraines. Consult with your healthcare professional for personalized advice and guidance regarding examinations and tests for ocular migraines. Diagnosis is primarily based on a combination of medical history, symptoms, and ruling out other possible causes. If there are any doubts or atypical features in your case, your doctor may recommend further consultation with a neurologist who specializes in conditions of the nerves and brain.
The goals of treatment for ocular migraines are to relieve symptoms and reduce recurrence. The following are possible treatment options for migraines in general. Treatment may vary depending on a specific diagnosis of the type of migraine (for example, migraine with aura or retinal migraine) and symptoms.
Medications:
- Nonsteroidal anti-inflammatory drugs (NSAIDs): These medications, such as ibuprofen, provide pain relief by reducing inflammation.
- Triptans: Drugs like sumatriptan constrict blood vessels in the brain, reducing pain symptoms.
- Ergot alkaloids: Ergotamine and dihydroergotamine prevent blood vessels from dilating, thus preventing headaches.
- CGRP inhibitors: These medications block a substance that triggers inflammation, vasodilation, and pain. These actions help reduce migraine pain and symptoms.
- For migraines accompanied by nausea and vomiting, antiemetics may help reduce nausea and vomiting associated with migraines. Examples include metoclopramide and chlorpromazine.
- Other medications that may be used to help prevent migraines in people who have frequent migraines include:
- Beta-blockers: Metoprolol and propranolol slow down the heart rate, reducing migraine frequency.
- Antidepressants: Amitriptyline and venlafaxine can help with associated depression or insomnia symptoms.
- Anticonvulsants: Topiramate and valproate sodium may be used to prevent future migraine episodes.
- OnabotulinumtoxinA: This injection helps decrease the frequency and severity of migraines by blocking nerve signals.
Health behavior changes:
- Identifying triggers: Avoiding triggers like certain foods, stress, or lack of sleep can help prevent migraines.
- Managing stress: Techniques such as relaxation exercises or counseling can reduce stress levels.
It's important to note that treatment decisions should be based on individual factors, including previous treatment history. Always consult with a healthcare professional for personalized advice.