IPL/OPT Filter Selection: Matching Cut-Off to Indication
An IPL handpiece is only as versatile as the operator\’s filter logic. Cut-off filters select which bands reach the skin — picking them by indication instead of habit separates calibrated treatment from flashing and praying.
Filter Logic by Target
| Indication | Cut-off | Reasoning |
|---|---|---|
| Superficial pigment (freckles) | 560-590 nm | Shorter wavelengths carry melanin absorption; keep enough punch for the epidermis |
| Diffuse redness / fine vessels | 530-560 nm | Oxyhemoglobin peaks sit lower — tighter bands hit vessels with less pigment competition |
| Darker skin toning | 640+ nm | Longer wavelengths bypass epidermal melanin — safety first |
| Hair reduction (light skin) | 640-690 nm | Deep delivery with melanin targeting intact |
Three Operating Rules
- Lower cut-off = more superficial action = more pigment risk on tanned skin
- When torn between two filters on type III+ skin, choose the higher cut-off and adjust fluence up modestly
- Test spots on the jawline or ear-adjacent skin before full-face passes with any new filter/fluence pair
Square-pulse OPT platforms make filter-plus-fluence combinations predictable because each pulse delivers a flat energy profile; the five-session photofacial plan is where these settings get scheduled into a course.