I always use liner (top only) on the upper waterline in a dark brown or my favorite navy to whiten the eyes.
We do lose definition and liner brings that back. If I do wear liner on the lid itself, it's most often an eye shadow in a greyish/taupe shade. I would think if wearing a mask, the eyes do take center stage and I'd definitely suggest trying the tightlining liner technique. It's more subtle than a line on the lid itself.
That's how I've been lining my eyes for years. I have to recommend Maybelline precision skinny eyeliner pencil tightline with. It stays put and easy to apply. It's only $8 but hard to find in brown. CVS has brown.
Shanus, any recommendations for a navy pencil easy to tightline in navy? Ty