Dry eye is not something that we normally think of as genetic. I would say my dad has super dry eyes and I tend to have dry eyes, so maybe there is some form of connection there. I think, for the most part, there are so many reasons why dry eye can happen and it is probably not genetics. There has never been a link between them, that I know of.
There is probably a genetic component there, but it is not directly linked like macular degeneration is, where if you have a family history of it, then you have a higher risk of that. Dry eye, I believe, is more like high blood pressure, diabetes, and all that. If you think of it, it is more like a symptom too. So, dry eye is a symptom of other things going on and maybe those things are genetic, but the dry eye itself I would not say is not genetic.