Eravity Laser in Seoul: What This 1064 nm Laser Can Do for Skin Firmness, and What the Evidence Shows

What kind of device is Eravity?

The only peer-reviewed study (one checked by other experts before publication) describes Eravity as a 1064 nm Nd:YAG laser that delivers 650-microsecond (µs) pulses at 40 pulses per second.¹ A microsecond is a millionth of a second, and a pulse is one short burst of light.

1064 nm is the standard wavelength of the Nd:YAG laser. It is absorbed relatively little by melanin, the pigment that gives skin its color, which is why it has been used across a wide range of skin types.² The same wavelength is used in very different ways depending on pulse length and energy, so when reading research it matters which settings were used.

What is a non-ablative laser?

Eravity is a non-ablative laser, meaning it does not remove the epidermis (the outer layer of skin). Non-ablative lasers leave the surface intact and warm the dermis (the main body of the skin underneath), aiming to improve wrinkles and photoaging (skin aging caused by the sun).

It helps to think of lasers in three groups. Ablative lasers remove the surface; fractional lasers create microscopic columns of injury; non-ablative lasers leave the surface as it is. Non-ablative lasers produce smaller changes than the other two, but carry less downtime and risk.⁵

Lasers in three groups

Replay

1. 1Ablativeremoves the surface
2. 2Fractionalcreates microscopic columns of injury
3. 3Non-ablativeleaves the surface and warms the dermis — Eravity
4. 4The trade-offnon-ablative gives smaller changes but less downtime and risk

How is it different from ultrasound lifting?

It works differently from ultrasound lifting such as Ulthera. Ultrasound lifting focuses sound waves at set depths beneath the skin, reaching the dermis and the SMAS. The SMAS is a thin layer that covers the facial muscles under the skin, the layer lifted in a facelift.⁶ Eravity uses light. We found no research showing that Eravity delivers heat as deep as the SMAS.

What happens inside the skin?

Light at 1064 nm is not strongly captured by melanin at the surface, so it passes into the dermis and turns into heat there.² Heating the dermis is thought to start a process in which collagen (the protein fibers that support the skin) is rebuilt.

In a study of a similar microsecond 1064 nm Nd:YAG laser (300 µs), skin samples from nine people were examined under an electron microscope after three sessions. At one and three months, collagen fibers in the upper (papillary) dermis were thinner, a change that fits with new collagen being formed. Younger patients showed larger changes.³ In the same study, people who had facial redness beforehand saw it reduce.³

Where 1064 nm light becomes heat

Replay

1. 11064 nm light650-microsecond pulses, 40 per second
2. 2Through the epidermismelanin absorbs little, so it reaches the dermis
3. 3Heat in the dermisthe dermis is warmed without removing the epidermis
4. 4Collagen changesimilar lasers: papillary collagen fibers became thinner — consistent with new collagen
5. 5Small vesselssimilar lasers: redness decreased in people who had red faces

What does research show, and what is still unknown?

Research on Eravity itself

So far there is one study of Eravity itself. Sixteen people with under-eye wrinkles and dark circles had five sessions one week apart, measured with a skin analyzer. Their wrinkle score fell from 4.15 to 3.32 by the last session, and was 3.71 one month later. It improved, then partly slipped back after a month. The dark-circle score also improved but partly returned toward baseline one month later.¹

Six of the sixteen rated themselves greatly improved, while six reported no change or slight improvement.¹ Apart from redness that settled within an hour, the researchers observed no other adverse effects.¹

The Eravity study: under-eye, 16 people

Replay

1. 1Five weekly sessions16 people with under-eye fine lines and dark circles · measured with a skin analyzer
2. 2At the last sessionwrinkle score 4.15 → 3.32
3. 3One month later3.71, partly returned · dark circles similar
4. 4Self-rating6 of 16 greatly improved, 6 no change or slight

That study had no control group (no comparison with untreated people), was small and single-center, and was funded by the device manufacturer. Its authors note that collagen changes were not confirmed in tissue and that there was no long-term follow-up.¹ It also did not measure firmness or sagging directly.

Firmness and sagging: what similar lasers suggest

In 34 people who had at least seven sessions with a long-pulse 1064 nm Nd:YAG laser, physician ratings of laxity fell by 17.3% and coarse wrinkles by 11.9%. The authors described the improvements as subtle and gradual.²

A split-face study in 12 people compared one long-pulse 1064 nm laser session with one radiofrequency session on the two halves of the face. It found higher laxity improvement scores on the laser side. But the author concluded that larger controlled studies were needed.⁴ Because pulse length and energy in these studies differ from Eravity's, their results cannot simply be transferred to this device.

QuestionEvidence so far

Studies of Eravity itself16 people, under-eye, no control group, manufacturer-funded

Under-eye lines and dark circlesAnalyzer scores improved, partly returned at 1 month

New collagenTissue changes in 9 people (similar laser)

Firmness and saggingSubtle improvement in similar-laser studies

How long it lastsNo long-term data

Which concerns does it suit, and when does another method fit better?

In short, a non-ablative 1064 nm laser like Eravity trades a small change for a light recovery, with results that build gradually over several sessions.²⁵ It is worth considering for fine lines, rough texture and mild loss of firmness when you want to keep downtime low.

It is usually not the right tool for lifting a visibly sagging face, substantially changing deep wrinkles or depressed scars, or replacing lost volume.

What is considered first, by concern

• 1If it is fine lines or rough texture

  Subtle change over several sessions; a fractional laser is also considered if there are scars

  Eravity

• 2If the face is red and uneven

  Less redness was reported with a similar laser; the cause of the redness is checked first

  Find the cause first

• 3If the jawline or under-chin has sagged

  Change with this laser may be small, so ultrasound lifting is considered as well

  Ulthera (HIFU)

• 4If cheeks or forehead are hollow, or sagging is deep

  A laser cannot restore volume, so fat grafting or a facelift is discussed

  Fat grafting or facelift

If your skin tone is darker: 1064 nm is a wavelength with low melanin absorption, and it has been used across many skin tones.² Pigment changes are still possible depending on the settings, so the strength is matched to your skin type.

Matching the method to the concern

Method	Where it acts	Main concerns
Eravity (1064 nm laser)	Passes the epidermis, warms the dermis	Fine lines, texture, mild firmness
Ultrasound lifting (HIFU)	Focal points from dermis to SMAS	Mild sagging of brows and under the chin
Fractional laser	Microscopic columns of heat injury	Scars, texture, wrinkles
Fat grafting, facelift and similar	Volume and deeper layers directly	Volume loss, deep sagging

What are the session, recovery and precautions like?

At Bonita Clinic, we perform Eravity as a non-surgical treatment after a numbing cream. You go home the same day, and there are no stitches. We advise that you can wash your face and wear makeup right after treatment, and that mild redness settles within a few hours. In the device study, redness settled within an hour.¹ Depending on the device and intensity, redness, swelling or flaking can last a few days, and pigment changes occasionally occur.

The studies of similar lasers reported no serious side effects, but each involved no more than a few dozen people.¹²³ Any heat-based treatment can react differently depending on settings and skin condition. That is why your recent treatments and any skin conditions need to be known first.

Aftercare advice:

• Use sunscreen when going outside.
• Avoid harsh cosmetics and scrubs for a week.
• Avoid saunas and other hot environments for a week.
• If there is redness or swelling, use a soothing anti-inflammatory product.

How long recovery takes, and whether follow-up visits are needed, depends on the area treated and on your skin.

How many sessions?

Bonita Clinic carries out one to three sessions as needed. The device study used five sessions a week apart, and the similar-laser study used seven or more.¹² No study has compared how many sessions are enough, so it is realistic to decide while watching how your skin responds.

How we approach it at Bonita Clinic

Skin and lifting options you can discuss in Seoul

Dr. Kwang-Seop Chung, a plastic surgeon board-certified in Brazil, has seen patients himself at the same Bonita Clinic location since it opened in 1995. For skin quality and firmness, the options discussed at consultation are the devices and procedures we actually use:

• Eravity, the 1064 nm laser described here, for fine lines, texture and mild loss of firmness
• Ulthera focused ultrasound when mild sagging of the brows, jawline or under the chin is the main concern
• Other lasers and a radiofrequency device among our equipment, chosen by whether firmness, pigment, redness or texture comes first
• Multi-lifting or a facelift consultation when fat, lost volume or deep sagging is part of the cause

Which device or combination fits is decided after your skin has been examined.

Why does the plan and cost differ from person to person?

Two people asking about "Eravity for firmness" can end up with different plans. The number of sessions, the area treated and whether other devices are combined all change what is involved.

• Area treated: full face, under-eye, neck
• Number of sessions, one to three
• Settings for your skin type
• Whether other devices are combined
• Recent treatments that change timing
• Your main goal: firmness, texture, redness

Final plan and quote after seeing you in person

A final estimate is given after your skin has been examined in person, once the number of sessions and any combination with other treatments are clear.

What can photos show, and what needs an in-person exam?

Photos help to judge whether your main concern is texture and fine lines, redness, pigment or sagging, which is the first step in deciding whether Eravity is worth discussing. They cannot set the device settings.

Photos can show

• Fine lines and visible texture
• Redness and its spread
• Visible spots and uneven tone
• Sagging versus hollowing, roughly

Needs an in-person exam

• Skin type and sensitivity
• Active acne or inflammation
• How lax the skin feels
• Pigment type under proper light
• Recent treatments and skin products

Helpful photos: your face front-on and from both sides, in daylight or even indoor light, without makeup or filters, plus close-ups of the areas that bother you. You can send us a message with your photos and a list of recent laser, lifting or filler treatments.

Planning your visit around the treatment

What is confirmed in advance is the treatment information above. It is a non-surgical treatment under numbing cream, you go home the same day and there are no stitches. As we advise, face washing and makeup are possible straight after. Whether one session or a series is planned, and how far apart the sessions should be, is decided with you at consultation. This is because we watch changes over two to four weeks after a session.

When planning a trip, keep in mind that sun protection is needed afterwards, and that saunas, hot environments and harsh skin products should be avoided for a week. Changes develop gradually, so the result is usually judged after you are back home. Dated photos taken from the same angles in similar light make comparison easier. If redness, swelling or darker patches persist after you return, contact us or see a local doctor.

Frequently asked questions

How is Eravity different from Ulthera?

Ulthera focuses ultrasound at set depths beneath the skin, creating small heated points in the dermis and the SMAS.⁶ Eravity is a laser that warms the dermis with 1064 nm light.¹ Ulthera is aimed more at mild sagging of the brows and under the chin. Non-ablative lasers like Eravity are aimed more at the quality of the skin itself, such as fine lines and texture. The two are sometimes planned together.

Will one session firm up my skin?

A clear change after a single session is unlikely. With similar lasers, improvement appeared gradually over several sessions,² and the device study reported results after five sessions.¹ Bonita Clinic watches the changes for two to four weeks after a session and splits treatment into one to three sessions if needed.

Can it lift a sagging jawline or smooth deep wrinkles?

Non-ablative lasers belong to the group with smaller changes and lower risk.⁵ Even in studies of similar lasers, improvement in sagging and coarse wrinkles was modest.² For a sagging jawline, consider Ulthera; if volume has been lost or the sagging is deep, methods such as Multi Lifting or a facelift are worth discussing.

Does it hurt, and will I need time off?

Bonita Clinic applies a numbing cream before treatment and advises that you can wash your face and wear makeup right afterwards. In the device study, treatment was done without anesthesia and redness settled within an hour.¹ Depending on your skin and the intensity, redness or flaking can last a few days.

Can I have it if my skin is darker?

1064 nm is a wavelength that melanin absorbs relatively little, and in a study of a similar laser it was used on skin types I to V.² Skin type groups skin by how easily it burns or tans; higher numbers mean darker skin. Pigment changes can still occasionally occur, so settings are matched to your skin type and sun protection afterwards is essential.

What to prepare before your consultation

• Your main concern: firmness, fine lines, texture, redness or pigment, and which comes first
• Laser, lifting or filler treatments in the past six months, with dates
• Whether you use retinoids or medicines that make your skin sun-sensitive
• Whether you have had lasting redness or dark marks after earlier treatments
• Upcoming events such as a wedding or business trip, so the timing can be planned around them

Bonita Clinic is on the 3rd floor of 565 Gangnam-daero, Seocho-gu, Seoul, about 100 m on foot from Exit 8 of Nonhyeon Station (Line 7). You can read more on our Eravity page. For deeper lifting with ultrasound, see Ulthera and the guide to Ulthera lifting; for a fractional laser aimed at texture, fine lines and pores, see Ultra Clear.