Study Examines Link Between Migraine Headaches and Dry Eye Disease

Understanding Dry Eye Disease

Dry eye disease is an eye condition characterized by insufficient tear quality, leading to poor lubrication and moisture for the eyes. Patients suffering from this disorder often experience symptoms such as burning sensations, irritation, and blurred vision. If left untreated, advanced dry eye disease can result in permanent eye damage and significantly impact a person’s quality of life. A substantial portion of the U.S. population is affected by this condition.

The Impact of Migraines on Quality of Life

Migraine headaches are prevalent and can severely diminish an individual’s quality of life. The Migraine Research Foundation identifies migraines as the third most common illness globally. More than just severe headaches, migraines are classified as a neurological disorder with symptoms that may include intense throbbing pain, nausea, vomiting, tingling, visual disturbances, dizziness, and heightened sensitivity to light and sound. They are particularly common among women and can last from several hours to three days.

Previous Research and Study Design

Prior research has suggested a possible correlation between dry eye disease and migraine headaches, yet these studies often reported conflicting results and were limited by small sample sizes. To address this, researchers from the University of North Carolina (UNC) conducted a comprehensive study to evaluate whether individuals with diagnosed migraines are more likely to also have dry eye disease.

The findings, published in JAMA Ophthalmology, are based on data gathered from over 72,000 patients at the UNC ophthalmology clinic over a decade. The cohort comprised approximately 60% men and 40% women. Researchers utilized an online system to identify patients diagnosed with either migraine headaches or dry eye disease and categorized them into subgroups based on age and sex. Statistical analyses were performed using computer software, which were repeated while accounting for potential confounding factors such as medication history, autoimmune diseases, and prior eye surgeries.

Findings on Migraine and Dry Eye Disease Risk

The study revealed that individuals diagnosed with migraine headaches have a 20% increased risk of also being diagnosed with dry eye disease. The correlation was particularly pronounced among men and women aged 55 to 64. The analysis suggested that female gender and older age may significantly influence the strength of the association between the two conditions. Researchers hypothesized that a shared inflammatory process could link migraine headaches and dry eye disease, although this remains unconfirmed.

Limitations and Conclusions

Despite its strengths, the study has limitations. It primarily involved data from a single clinic, which may limit the generalizability of the findings. Additionally, unidentified factors could have influenced the outcomes, and the study could not definitively determine if the observed link is coincidental. Nonetheless, the large patient sample size bolstered the reliability of the statistical findings, instilling confidence in the researchers’ conclusions.

The researchers asserted that patients with migraine headaches are more likely to be diagnosed with dry eye disease. They recommended that healthcare providers treating migraine patients should consider the potential risk for dry eye disease.

References

Ismail OM, Poole ZB, Bierly SL, et al. Association Between Dry Eye Disease and Migraine Headaches in a Large Population-Based Study. JAMA Ophthalmol. March 2019. doi:10.1001/jamaophthalmol.2019.0170

Is dry eye disease associated with migraine headaches? [news release]. University of North Carolina; March 7, 2019. EurekAlert! Web site. https://www.eurekalert.org/pub_releases/2019-03/jn-ide030519.php. Accessed March 20, 2019.

Migraine Facts. Migraine Research Foundation. https://migraineresearchfoundation.org/about-migraine/migraine-facts/. Accessed March 20, 2019.