The Tyndall effect after under-eye filler: why it looks blue, and how it is corrected
Medically reviewed by Dr Sin Yong · Last reviewed · 6 min read
Published 9 October 2026 · Reviewed by Dr Sin Yong
A bluish, grey or slightly translucent tint under the eye that appears after tear trough filler, and does not fade like a bruise, is usually the Tyndall effect. It is named after the physicist who described how small particles scatter blue light. In filler, it means hyaluronic acid has been placed close enough to the thin eyelid skin to show through.
Short answerThe Tyndall effect after filler is a bluish tint caused by hyaluronic acid sitting too superficially under thin skin, where it scatters light. It does not usually fade on its own because the filler persists. It is usually corrected by dissolving that superficial deposit with targeted hyaluronidase; in a series of 1,452 tear trough treatments it occurred in 3.3% of eyes.
A persistent blue-grey or translucent tint, sometimes with a visible ridge
Cause
Hyaluronic acid filler placed too superficially under thin eyelid skin
How often
3.3% of 1,452 tear trough treatments in one large series (Wilde 2023)
Not to confuse with
Bruising, which fades over days; dark circles from pigment or vessels
Correction
Targeted hyaluronidase to the superficial deposit, ideally after ultrasound
Why does filler look blue?
Hyaluronic acid gel is clear. When it sits deep, on bone or beneath the muscle, there is enough tissue above it that light passing through the skin is not noticeably changed. When it sits just under the very thin skin of the lower eyelid, the gel scatters shorter, bluer wavelengths of light back towards the viewer, and the area reads as blue or grey. The link between superficial hyaluronic acid and bluish discolouration was described in an early report on its management (Hirsch, Lasers Surg Med 2006).
Filler too close to the surface under thin eyelid skin is what produces the bluish tint. Schematic, not to scale.
Is it a bruise, a dark circle or the Tyndall effect?
A bruise changes colour and fades over one to two weeks. A dark circle from pigment or from visible vessels is present before filler and is not raised. The Tyndall effect appears after filler, persists for months, often sits over a slight ridge, and may look worse in certain lighting. Pressing gently on a Tyndall area sometimes reveals a soft, bead-like edge. A doctor can usually tell the difference on examination, and ultrasound can show the superficial gel directly.
How it is corrected
Because the cause is hyaluronic acid, it can be broken down. Hyaluronidase is placed into the superficial deposit, using a small test dose first as published guidance recommends (King, J Clin Aesthet Dermatol 2018). Dr Sin Yong examines the eye at rest and in expression, uses ultrasound to see how superficial the gel is and whether there is more than one pocket, and then dissolves selectively. The tint usually fades as the deposit causing it is dissolved. Whether any filler is placed again afterwards, and if so how deep, is a separate decision made once swelling has settled.
Under the eye, the depth at which filler sits decides whether it shows.A bluish tint that persists for months, and sits over a slight ridge, is rarely a bruise.
Can the Tyndall effect be prevented?
Placement depth and volume are the main factors. Cadaver work on the tear trough and lid–cheek junction supports placing product deeper than the superficial planes in this area (Haddock, Plast Reconstr Surg 2009), and in a large tear trough series the bluish tint was seen in 3.3% of eyes (Wilde, PRS Global Open 2023). Some eyes are better not treated with filler at all; when not to have tear trough filler explains which.
Frequently Asked Questions
Usually not quickly. It is caused by hyaluronic acid filler, which can persist for years. It is corrected by dissolving the superficial deposit with hyaluronidase.
With targeted hyaluronidase placed into the superficial filler, after a test dose. Ultrasound helps show how superficial the gel is and whether there is more than one pocket.
The cause is filler, so dissolving it is the direct treatment. Laser has been reported for the Tyndall effect (Hirsch 2006), but hyaluronidase addresses the gel itself.
The tint itself is not dangerous. Vision change or eye pain after filler needs emergency care immediately; pale, dusky or mottled skin or worsening pain needs urgent assessment now.
References
Hirsch RJ, Narurkar V, Carruthers J. Management of injected hyaluronic acid induced Tyndall effects. Lasers Surg Med. 2006;38(3):202-204. doi:10.1002/lsm.20283. source
Wilde CL, Gupta A, Lee S, Ezra DG. Tear trough filler using the three-point tangent technique: lessons from 1452 tear trough applications. Plast Reconstr Surg Glob Open. 2023;11:e5060. doi:10.1097/GOX.0000000000005060. source
Haddock NT, Saadeh PB, Boutros S, Thorne CH. The tear trough and lid/cheek junction: anatomy and implications for surgical correction. Plast Reconstr Surg. 2009;123(4):1332-1340. doi:10.1097/PRS.0b013e31819f2b36. source
King M, Convery C, Davies E. The use of hyaluronidase in aesthetic practice (v2.4). J Clin Aesthet Dermatol. 2018;11(6):E61-E68. PMID 29942426. source
Murray G, Convery C, Walker L, Davies E. Guideline for the safe use of hyaluronidase in aesthetic medicine, including modified high-dose protocol. J Clin Aesthet Dermatol. 2021;14(8):E69-E75. PMID 34840662. source
Signorini M, Liew S, Sundaram H, et al. Global Aesthetics Consensus: avoidance and management of complications from hyaluronic acid fillers. Plast Reconstr Surg. 2016;137(6):961e-971e. doi:10.1097/PRS.0000000000002184. source
