Yellow Laser vs Pico Laser

Which type of dark circle suits yellow laser or pico laser

Each laser acts only on the chromophore that absorbs its wavelength, so the type of dark circle determines which laser, if either, is appropriate. The two home checks, stretching the skin and changing the lighting, are explained in the Dark eye circles guide.

• Brown and unchanged when the skin is stretched Indicates a pigmented circle, the type pico laser is designed to treat.
• Blue or purple, darker on stretching, worse in the morning Indicates a vascular circle, the type for which yellow laser is marketed.
• Fades when the skin is stretched or lit from the front Indicates a shadow cast by a tear trough or eye bag. Neither laser alters it, whereas filler or eye bag treatment can.

Most patients in Singapore present with a mixed circle that combines two or more of these components, so a single laser rarely clears the whole circle.

What studies show about yellow laser vs pico laser for dark circles

• EvidenceEvidence for pico laser on pigmented dark circles. In one small trial, 10 patients given three 755 nm pico sessions improved significantly at 132 days, whereas 19 patients given a single 1064/532 nm session showed no significant change. Both arms were funded by the device manufacturers. In a 2024 split-face study of 12 women, 532 nm pico produced improvement on imaging only and caused post-inflammatory darkening more often than lightening. The 532 nm wavelength is strongly absorbed by melanin in the upper layer of the skin, which raises the risk of darkening in Asian skin. Systematic reviews of laser for periorbital pigmentation report mild to moderate benefit, drawn from small, low-quality studies. Pigment lasers as a group retain Grade B on this site, whereas the evidence for pico laser alone rests on these small trials.
• EvidenceEvidence for yellow laser on dark circles, Grade D. No study of 577 or 578 nm laser for dark circles has been published. The available trials concern melasma and report mixed results. A split-face study of 82 patients found better scores when 577 nm laser was added to hydroquinone cream, whereas a study of 24 Thai women found no lasting benefit from copper bromide laser and some darkening.
• EvidenceEvidence for laser on blue under-eye veins. The only laser studied for venous dark circles is a long-pulsed 1064 nm Nd:YAG, which penetrates deeper than yellow light and therefore reaches veins beneath the thin lid skin. All 26 patients in that series were rated clear at 12 months, although the absence of a control group limits the finding.
• Yellow laser vs pico laser head to head, Grade D No study has compared the two lasers for dark circles or for any other pigmentary condition.

Yellow laser vs pico laser side effects and eye safety

• Post-inflammatory darkening Darkening is the main risk of both lasers in Asian skin, because heat and inflammation stimulate melanocytes to produce more pigment. In melasma trials, the odds of darkening after 755 nm pico were about seven times those with creams, and darkening has been reported after copper bromide yellow laser and after 532 nm pico around the eyes. Wider spacing of sessions, low energy settings and daily sunscreen reduce the risk.
• Eye injury Laser light near the eye can burn the cornea or damage the iris and retina. In a review of 119 reported laser eye injuries, most direct injuries occurred without adequate eye protection, and a corneal burn has been reported during pico treatment of the eyelid. Expert consensus regards lubricated metal eye shields, placed over the eyeball beneath the lids, as mandatory for laser work around the eye.
• Who may operate them In Singapore, class 4 lasers, which include medical pico and yellow lasers, may be operated on patients only by registered doctors at premises approved by the Ministry of Health.

Choosing between yellow laser and pico laser by dark circle type

• Brown, pigmented circles Sunscreen and a lightening or retinoid cream for 3 months come first, followed by pico or another pigment laser if the response is insufficient.
• Blue or purple circles Allergy control comes first where rhinitis is present, followed by a skin-thickening booster. Yellow laser is not a first choice, because no study has tested it on dark circles.
• Shadow from a hollow or bag Neither laser is appropriate. Filler or eye bag treatment addresses the shadow, as set out on the Sunken eyes treatment page.
• Mixed circles Each component is treated separately, beginning with the one that contributes most to the darkness.