Filter Lenses for the Prevention of Migraine Attacks

Migraine is a neurological disorder that often causes severe, throbbing headaches that can be accompanied by nausea and vomiting. In addition, sound or light sensitivity is often seen. An attack can last up to 72 hours. Migraine can occur in one half of the head and is exacerbated by physical activity. There are several different types of migraine, of which the inherited migraine typically cannot be cured. Migraine affects about 15% of all adults worldwide, but about twice as many women as men. About 10% of diagnosed patients have chronic migraine, which is characterized by at least 15 days of severe headache each month. Many patients have tension headaches between attacks. Migraine most often starts in the most productive years of life, between the ages of 20 and 50, and most affects the age group of 35-54 years. For many women, migraine debuts after childbirth, while others experience that it disappears after childbirth. Several women experience that they get migraine when they have their period. This migraine is called hormonal and can follow them for many years. Several studies have shown that migraine attacks are triggered by light, and many become very light-sensitive during an attack. So far, a FL 41 lens, which excludes blue-green light, has been the only migraine-specific optical treatment. A new lens called "Blue Cut for Night Glass" has in a study resulted in participants experiencing less migraine. For 4 weeks, 10 participants used only the lens in the evening. Results showed that they had fewer days with headaches. The lens is so new that it has not yet come into regular production and trade. In connection with the present study, the investigators have received 13 sets of lenses. For many years, FL-41 has been the preferred filter lens for the prevention of migraine attacks, since it was first successfully tested on children in 1991. Since this study, much has happened in terms of the development of filter lenses. The purpose is to investigate whether the Blue Cut for Night filter is better at reducing migraine compared to the FL-41 filter or a filter blocking light below 500 nm. A control group will use clear lenses without filter. This is a controlled, randomized and double-blind trial.