This is surprising.
According to Medical News Today, many studies have come to the conclusion that headaches and migraines have a correlation to dry eyes.
A study in 2017 stated that 14% of those who experienced migraines have also had dry eyes. In another study conducted in 2019 reported that people who have migraines are 1.42 times more likely to get diagnosed with dry eyes.
Cluster headaches which usually only affect one side of the head also can lead to eye strain which is a possible link to the headache. Also, eye strains can also cause headaches due to tension and pain.
To help treat dry eyes, experts suggest using eye drops, therapeutic lenses, and tear duct plugs to help maintain moisture in the eyes. If those do not work then it is recommended to undergo surgery.