
I suppose a lot depends on the condition, it's extent, and whether it impacts on quality of life.
The odd misplaced eye lash is a bit like an ingrowing toenail (I'm sure people with those probably had relatives with them), once removed it will be dealt with, not exactly surgery. Rows of abnormal lashes would be something else.
Some links suggest these lashes are very common in puppies often very soft and disappear over time (we all know children have much thicker and more lashes than we do as adults).
In the end we inherit every trait somehow, and no living thing is free from imperfections, minor ones will not impact on functionality.
Many problems have emerged because of shrinking gene pools. Apart from wars two reasons can commonly cause this, using dogs too often that are considered superior (you get the good and bad points), but also avoiding using dogs that have minor issues or have relatives with issues in conditions that do not have definitive DNA tests and in the past whole lines were lost because something in the line had an issue.
The fact that there were lots of perfectly good animals produced too was ignored.
As someone said if we were to avoid every issue no breeding of any sort would take place, including us.