Seeing bright lines, shimmering zigzags, or a blurred area in your field of vision can be particularly unsettling. These symptoms are often associated with what is known as a migraine with visual aura. Faced with these visual manifestations, many people wonder if their glasses could be the cause or, conversely, if a new prescription could solve the problem. However, the link between glasses and migraines with visual aura is often misunderstood. Glasses can sometimes help reduce certain factors of visual fatigue, but they do not directly treat ocular migraines. Understanding this distinction is essential to know when to consult a vision professional and when a medical evaluation is necessary.
What is a migraine with visual aura?
The term "migraine with visual aura" is used to describe a migraine accompanied by gradual and temporary visual symptoms. These manifestations are generally linked to a temporary disturbance of neurological activity involved in processing visual information. Contrary to some beliefs, the problem usually does not originate from the eye itself, but rather from the neurological mechanisms associated with migraine, in other words, the brain. Visual symptoms often appear before the headache, but they can also occur without significant pain developing afterward. Indeed, 40% of migraine sufferers with visual aura will not have a migraine after the aura. This is then referred to as visual aura without migraine or acephalgic migraine.
Affected individuals often describe phenomena such as:
- bright or shimmering lines;
- zigzag patterns;
- blurred or missing areas in the visual field;
- increased sensitivity to light;
- temporarily altered vision.
In most cases, these symptoms disappear spontaneously after a few minutes or tens of minutes. The duration of visual symptoms varies from 5 to 60 minutes.
Can glasses cause a migraine with visual aura?
No. A pair of glasses does not cause a true migraine with visual aura. However, inadequate visual correction can lead to significant eye strain. This fatigue can sometimes promote the onset of headaches or contribute to certain triggers in individuals predisposed to migraines. For example, an inadequate prescription, poorly centered lenses, or difficulty seeing clearly for extended periods can increase the effort required from the visual system. It is therefore possible that some people associate their glasses with their migraines when the problem is instead related to a correction that no longer adequately meets their visual needs.
Can glasses help reduce certain triggers?
Even if they don't directly treat ophthalmic migraines, glasses can help improve visual comfort and reduce certain factors that can worsen symptoms in some people.
Table – What Glasses Can and Cannot Do
| Benefit | Can glasses help? |
|---|---|
| Correction of blurred vision | Yes |
| Reduction of visual fatigue | Yes |
| Comfort when working on screen | Yes |
| Sensitivity to certain glares | Sometimes |
| Guaranteed prevention of ocular migraines | No |
| Treatment of an active ocular migraine | No |
Some people also find greater comfort through anti-reflective coatings or lenses adapted to their work environment, especially when spending several hours in front of screens.
When should visual symptoms be evaluated?
Any sudden onset of visual symptoms deserves special attention, especially when it is a first episode. While migraines with aura are generally benign, several other ocular or neurological conditions can cause similar symptoms.
A rapid evaluation is particularly recommended when:
- symptoms appear for the first time;
- episodes become more frequent;
- significant vision loss occurs. A vision that becomes black (totally or partially in the visual field) is not normal. You should consult urgently;
- symptoms last longer than usual;
- they are accompanied by weakness, numbness, or difficulty speaking.
In these situations, a medical consultation is essential to rule out other potential causes.
IRIS Optician's Tip:
If you experience recurrent episodes of visual disturbances, even temporary, an eye exam can assess your eye health and check if your visual correction is still appropriate. An optometrist can also determine if a medical referral is necessary.
Can screen time worsen symptoms?
Time spent in front of screens is not recognized as a direct cause of migraine with visual aura. However, it can contribute to certain factors associated with visual discomfort. Prolonged exposure to screens often leads to decreased blinking, increased eye strain, and light sensitivity in some individuals. When these factors are combined with other known migraine triggers, such as stress, lack of sleep, or dehydration, they can sometimes increase overall discomfort. Maintaining good visual habits, taking regular breaks, and ensuring your prescription is up-to-date can help improve daily comfort.
What to remember about glasses and migraines with visual aura
Glasses do not cause migraine with visual aura and are not a treatment for this neurological condition. However, they can play an important role in visual comfort by correcting inadequate vision and reducing certain factors of eye fatigue. If you regularly experience unusual visual symptoms, it is recommended to consult a vision health professional. A complete evaluation will determine if your vision contributes to your discomfort and if further investigations are necessary.
FAQ – Migraine with visual aura and glasses
Can glasses cure a migraine with visual aura?
No. Glasses do not treat migraine with visual aura itself. However, they can improve visual comfort and reduce certain factors of eye fatigue.
Can a bad prescription cause migraines?
An inadequate prescription can cause headaches and eye strain. It does not usually cause a true migraine with visual aura, but it can contribute to discomfort.
What are the symptoms of a migraine with visual aura?
Symptoms often include bright zigzags, shimmering, blurred areas in the visual field, or increased light sensitivity.
Should I see a doctor if I see flashes or lights in my vision?
Yes. Any sudden appearance of unusual visual phenomena should be evaluated by a professional to rule out other ocular or medical conditions.
Do blue light filtering glasses prevent migraines?
No scientific evidence demonstrates that blue light filtering glasses prevent ocular migraines. However, they can improve visual comfort for some people who use screens for long periods.
When to consult an optometrist?
It is recommended to consult if your visual symptoms are new, recurrent, or accompanied by vision changes. An eye exam will assess your eye health and visual correction.
