Blurred vision after upper bleph. Is this normal?

The most likely reason for blurry vision after bleph / eyelid operations is dryness of the eyes, but it's best to have it checked out if it's been 3 weeks already.  Your surgeon or an ophthalmologist would be the right starting place.

Many people will have complaints about blurring after an upper eyelid bleph.  If you have been using an eye ointment, that will get into the eyes and create some blurring.  If you had a large amount of skin taken off, that can also change your glasses prescription due to a change in weight against the cornea and you may need to get that checked. The muscle that elevates the lid will have some swelling, and this is near the muscle that helps you look up.  So it is not uncommon to have a pulling sensation when you try to look up.  This will resolve as you heal further.