Your photo is taken in downgaze with the left eyebrow elevated - it appears that both sides have drooping issues. The right upper lid fold seems more redundant because the right brow (right side of frontalis muscle) is relaxed. The left brow is elevated - perhaps because of ptosis, but this is difficult to assess in one position of gaze. In primary gaze (straight ahead) with the forehead/ frontalis muscle relaxed, the brows may appear even lower than it this downgaze photo. Facial and periocular anatomy and overall appearance is affected by age, heredity, trauma, and other factors. So at the young age of 42, your drooping is not unusual. An Oculoplastic surgeon can help you with diagnosis, discussion of the many options available, and treatment. Best wishes!