Eyeballs stick to the eyelids during meditation

[EugeneTheSage]

Since I started meditating (4yrs ago) I've noticed that after long period of not moving your eyes they stick to your eyelids. Then you wanna move them to unstick because it is uncomfortable, and moving them interrupts meditation. 

 

For the last half-of the year they've become to stick more often.

Is it dry eye syndrom or what?