{
  "what": "Tear trough filler, also called under eye filler, is a small amount of soft hyaluronic acid placed deep along the bone to soften the tear trough, the groove between the lower lid and the cheek whose shadow makes the eyes look tired. At Dr Sin Yong's practice on Orchard Road, Singapore, he confirms a true hollow first, because filler does not treat pigment, visible vessels or eye bags from herniated fat, which it can make look heavier. The gel can be dissolved with hyaluronidase, and he performs every treatment personally.",
  "key_facts": [
    "Hollow vs bag: tear trough hollowing is a concavity that filler can soften; a true eye bag is a convexity of herniated orbital fat that filler worsens, and it is referred for plastic or oculoplastic surgical assessment",
    "Assessment: the under-eye is examined with the head tilted back and the gaze upward, gentle pressure on the closed upper eyelid reveals fat prolapse, stretching the skin separates pigment from shadow, the orbital rim is palpated, and earlier filler is scanned with ultrasound first",
    "Technique: soft, low-water-absorption hyaluronic acid placed on the bone, deep to the orbicularis oculi, usually through a blunt cannula from a single entry point away from the infraorbital foramen and angular vessels, in very small amounts and deliberately short of a flat correction",
    "Does not: lighten pigment, hide visible vessels or flatten an eye bag; collagen biostimulators are not usually chosen for the tear trough because they cannot be dissolved",
    "Not suitable: herniated orbital fat, marked lower-lid laxity or festooning, puffiness that comes and goes with fluid, allergy or sleep, earlier filler of unknown type, active infection near the eye, pregnancy or breastfeeding, or unreviewed blood thinners",
    "Risks: swelling, bruising and early unevenness are common; persistent puffiness, a bluish Tyndall effect from superficial placement and lumpiness can occur and can be corrected by dissolving the gel; rarely a blocked blood vessel, an emergency",
    "Urgent signs: skin that turns white, grey, blue or mottled, severe or increasing pain, or any change in vision",
    "Regulation: filler is a medical device regulated by the Health Sciences Authority and is injected by a doctor registered with the Singapore Medical Council"
  ],
  "references": [
    "Expert Recommendations on the Use of Hyaluronic Acid Filler for Tear Trough Rejuvenation. Journal of Drugs in Dermatology. https://pubmed.ncbi.nlm.nih.gov/35389598/",
    "The Efficacy and Safety of Hyaluronic Acid Injection in Tear Trough Deformity: A Systematic Review and Meta-analysis. Aesthetic Plastic Surgery. https://pubmed.ncbi.nlm.nih.gov/37684413/",
    "Infraorbital Hyaluronic Acid Filler: Common Aesthetic Side Effects With Treatment and Prevention Options. Aesthetic Surgery Journal Open Forum. https://pubmed.ncbi.nlm.nih.gov/35386936/",
    "Needle versus Cannula to Treat Tear Trough: A Prospective Study Comparing both Methods. Plastic and Reconstructive Surgery Global Open. https://pubmed.ncbi.nlm.nih.gov/37936826/"
  ],
  "owner_url": "https://drsinyong.com/tear-trough-refinement-dark-eye-circles/",
  "doctor": "Dr Sin Yong, aesthetic physician, Orchard Road, Singapore",
  "updated": "2026-10-31"
}