Yes, this is the dedicated eye probe for the FacialDefy 3.0 Pro. It may be used around the eye contour, but do not place it directly over the eyeball or expose the eyes to ultrasound energy. Clean the skin, apply a generous layer of conductive gel, and begin at the lowest comfortable intensity. Keep the probe in full contact with the skin and gently move from the inner under-eye area outward toward the temple. Use for approximately 10–15 minutes and avoid holding it on one spot for too long. Use once every 7–10 days, or every 15–20 days for sensitive skin. Results are gradual; some users may notice firmness after several sessions, while more visible results may take approximately 1–3 months. Results vary from person to person.  

You can view a tutorial video for HiFu 3.0 on the product page. It includes steps for adjusting the length.