LaseMD vs pico laser vs R2 Glow:
three lasers for pigment and tone, three different targets

What is the difference between LaseMD, pico laser and R2 Glow?

Lasers are chosen by what absorbs them. Melanin absorbs the short wavelengths used by pico and alexandrite lasers; water absorbs the 1927 nm thulium wavelength. That single fact separates the three treatments on this page.

The thulium laser treats a layer. The picosecond laser treats a lesion. R2 Glow treats a process. A patient who arrives asking which is better is usually asking the wrong question, because a single face can have all three problems at once, and the order matters more than the device.

What does a 1927 nm thulium laser like LaseMD do?

Thulium at 1927 nm is absorbed strongly by water, so its energy is deposited in the first fraction of a millimetre of skin, exactly where epidermal pigment, fine sun damage and the upper dermis sit. Delivered fractionally, it creates columns of coagulated tissue beneath an intact surface; the pigmented epidermis over each column is pushed out as it heals, which is why the skin looks bronzed and then flakes. LaseMD, made by Lutronic, runs this wavelength at low energy with a scanner, and is marketed with ampoules applied straight after treatment because the micro-channels make the skin more permeable for a short time. It is one brand among several at 1927 nm; the Fraxel, CO2 and Tetra Pro article describes the dual 1550 and 1927 nm version.

The published record for 1927 nm is largest for actinic keratoses and diffuse sun damage, with retrospective series in melasma and post-inflammatory hyperpigmentation, including low-energy, low-density protocols paired with topical tranexamic acid. A 2025 systematic review found improvements in texture, pigmentation and scar appearance with mild, transient adverse events, but noted relapses in melasma and a moderate to high risk of bias across the studies. It is a useful wavelength and a limited evidence base, which is how it should be described.

At this practice the 1927 nm thulium wavelength is not run as a stand-alone brightening treatment. It is one of the two wavelengths in Dr Sin Yong's FSX Laser, alongside 1540 nm, where it acts superficially on pigment and texture while the 1540 nm pass reaches the dermis for collagen. LaseMD itself is not used here.

“I do not start with the laser that removes pigment. I start with the one that stops the skin making more of it; otherwise we are polishing a surface that is still being painted.”

Dr Sin YongOn sequencing lasers for pigmentation

When is a pico laser the right tool?

A picosecond pulse is over before the heat it generates has time to spread, so pigment particles are shattered by a pressure wave rather than cooked. That makes pico the tool for a discrete, fixed deposit: a solar lentigo, freckles, a tattoo, and some post-inflammatory marks once the inflammation that made them has settled. A split-face study in Asian patients found a 755 nm picosecond laser cleared melasma pigment faster than a Q-switched 1064 nm laser over the first sessions, with a similar relapse pattern, which is a reminder that pico removes what is there and does not stop more being made.

Here the T2 Frax Radiance protocol runs on the DEKA TORO: a 785 nm picosecond pass for the deposit, 532 and 1064 nm nanosecond emissions where the lesion depth calls for them, and a longer thermal pulse for a dermal collagen response, which is where its tightening comes from. The pico laser Singapore page explains what one visit involves, and which pico suits whom deals with the question of which wavelength.

Pico is the wrong first tool in two situations. The first is a reactive, reddish, blotchy background, where fragmenting pigment without calming the driver gives a short-lived result and can provoke more. The second is active melasma in Fitzpatrick III to V skin, where the pigment risk of any energy is real and the gentler route is taken first.

What does R2 Glow do that the other two do not?

R2 Glow is a non-ablative protocol on a long-pulsed 755 nm alexandrite and 1064 nm Nd:YAG platform, the same class of laser used for hair removal, at entirely different parameters. Its target is not pigment. It is directed at the low-grade inflammation that, on a Singapore face exposed to year-round ultraviolet, keeps melanocytes switched on and leaves a reddish, dull background. The surface is left intact and the parameters are calibrated for Fitzpatrick III to VI. Brightness follows as a consequence of calming the process rather than being the direct target, which is why the R2 Glow page describes it as brightening by calming rather than by fragmenting.

Where a face has both a fixed brown deposit and an inflammatory background, which is most faces here, the two protocols are planned together as R2T2: R2 Glow on the driver, usually first when the skin is reactive, and T2 Frax Radiance on the deposit. Whether they run in one session or in sequence is decided at consultation. A thulium pass has no equivalent role in that plan, because it treats the layer rather than the process; where a patient asks for it by name, the answer is usually that the FSX Laser already carries that wavelength for the texture and pigment work it does well.

Why is melasma the exception for all three?

Melasma is hormonal, chronic, relapsing and heat-sensitive. Every laser on this page deposits heat, and in melasma heat is a trigger, so each can make the patches darker if the energy, interval or sun exposure is wrong. The 1927 nm literature records relapse; the pico literature records recurrence after clearance; even a long-pulsed pass at the wrong setting can provoke a flare. That is why melasma treatment in Singapore starts with diagnosis rather than a device, separating melasma from sun spots and post-inflammatory marks, which look alike and are treated almost oppositely.

In practice that means a melasma plan here usually begins with photoprotection, heat avoidance and topical therapy, with R2 Glow as the first in-clinic step if a laser is used at all, because it is directed at the inflammatory component and spares the surface. Pico toning at low fluence may follow once the skin is quiet; a thulium pass, where it is used, is at low energy and low density. Aggressive settings on any of the three are the commonest way a melasma patient leaves a clinic darker than she arrived. The post-inflammatory hyperpigmentation guide covers what is done if that has already happened.

What decides the plan

• Which brown it is: melasma, lentigo, freckling, Hori's naevus or post-inflammatory mark, confirmed on examination and with a Wood's lamp or dermoscopy where useful.
• Whether the background is reactive and red, which puts R2 Glow first.
• Fitzpatrick type and any history of darkening after treatment, sun or haze.
• Recent sun exposure, isotretinoin, pregnancy or hormonal change, which defer laser work.
• How much flaking or redness is acceptable in the patient's routine, which separates a thulium pass from a non-fractional one.