Greetings thanks for your question,
yes a fox eye treatment with threads lasts around 1 year, thats the reason why we recommend mostly cat eyes in a surgical way. When the threads dissoves the eyes and the skin will be the same like before. Not worser not better.
I believe you asked a related question (realself.com/question/sydney-au-treatment-sagging-face-skin-needling-rf-tightening).
The principles are similar: - Address the sagging; - Slow-down the rate-of-ageing.
My advice is to avoid filler and to avoid HIFU (e.g. Ultherapy) to the area.
De-bulking...