I am 58 yo. with very dry eyes. Is a Brow Lift a much safer option than Blepharoplasty?

Before undergoing any procedure please have an ophthalmic evaluation.  In my experience dry eye worsening is much more common after blepharoplasty than brow lifting.  However, it can occur with both.  There are ways to assess your corneal (ocular) protective mechanisms which will allow an assessment of your candidacy for surgeryBestDr. Massry

Upper eyelid blepharoplasty can be safely performed if it is conservative enough, to be sure the eyelids close easily.  A browlift can sometimes give a better cosmetic result than a conservative blepharoplasty.  With appropriate care, either can be performed

For me, the fact that you are already treating dry eyes means that your eye care will remain the same. Of course, you still want to be sure you protect the corneas. A brow lift and a blepharoplasty are not interchangable, That correct different things and have different indications. You need the one that provides the change you desire...or maybe both.