1. Anatomy - Danger zones
2. Aging process and hyaluronic acid filler
3. Ultrasound anatomy and technique
4. Hyaluronic acid filler rheology
5. Hyaluronic acid filler modification of degree, NMR
6. Hyaluronic acid filler impurities
7. Practical illustration of safer filler injection technique
8. Vascular complication and management
9. Ocular complications and possible treatment
10. Non vascular complication
11. Longevity of hyaluronic acid filler.