Is this a "dog ear" app 5 months after upper blepharoplasty? (Photos)

Please do not live with this.  Please ask your surgeon to fix this.  If you and your surgeon have had a breakdown in the relationship, please find another surgeon to help you with this issue.

The eyelids usually heal very favorably and the scars are seldom noticeable. You seem to have a hypertrophic scar. This may get better with time but it is not likely, if it has not happened by now. The direction of this scar also needs to be changed to fall in the natural crease. You should discuss it with your surgeon first and if you do not get a satisfactory response you may wish to seek a second opinion. 

It appears that some fine tuning of your scar is indicated.  It is unlikely that the appearance of the excess skin fold will improve that much at this point of your recovery. A rather simple scar revision could significantly improve the final result. See your plastic surgeon for  evaluation. 

Although the healing process is not finished yet, I would suggest considering a revision based on the problem areas that have persisted to this point.The lateral eyelid area in particular appears as though it could benefit from a change in incision design and final scar placement.  A scar after upper blepharoplasty should be a faint line that is barely noticeable.It would be interesting to know how things looked when you were in the early post-operative period during the first few days and weeks.

That looks like a hypertrophic scar I would go back to your surgeon to have him look at it before taking any actions. He will be the best one to give you what options you have next. It's not a dog ear it's just excess skin that needs to be excised. Surgeon may recommend  a small scar revision. Goodluck!