Lateral Canthoplasty (Outer Corner Surgery) in Seoul

What is lateral canthoplasty?

Lateral canthoplasty is a procedure that modifies the outer corner of the eye, called the lateral canthus. Its cosmetic aims are usually to lengthen the eye slightly toward the temple, or to soften an outer corner that tilts steeply upward and can make the expression look sharp or stern.

To understand what it can do, it helps to know the anatomy. The upper and lower lids meet at the outer corner and are anchored to the bony rim of the eye socket by the lateral canthal tendon, a strong band of connective tissue. The visible corner is not always the true end of the eye's surface: in some people the conjunctiva, the thin moist membrane covering the white of the eye and the inside of the lids, extends a little further, hidden beneath skin. Lateral canthoplasty uses that hidden space. If there is little of it, there is little to gain.

Who is a good candidate?

• Eyes that are short horizontally relative to the face
• A visible band of hidden conjunctiva beyond the outer corner when the skin is gently stretched
• A steeply upturned outer corner that you would like to soften
• Good lower-lid support and healthy tear film
• Realistic expectations about a change of a few millimeters

It is usually not suitable if there is little hidden conjunctival space, if the eyes are already long and wide-set, if there is lower-lid laxity or dry eye, or if the eyeball is relatively prominent. In these situations the procedure may produce little visible change, a higher chance of relapse, or unwanted exposure of the eye's surface. Sometimes other procedures, such as lower canthoplasty or a well-designed double eyelid, change the eye's overall shape more effectively.

How the outer corner shapes expression

People read faces quickly, and the outer corners of the eyes carry much of that reading. A steep upward tilt can look alert and sharp, but also severe or tense. A gently lowered corner often reads as soft and approachable. A short eye can make the face look slightly wider around the cheeks; a small extension can bring it into proportion. These impressions are subtle, which is why the change needed is usually small.

The canthal tilt, the angle of a line drawn from the inner to the outer corner, is one of the measures surgeons use. There is no single ideal angle. What looks balanced depends on the rest of the face: the brow, the cheekbones, the nose bridge and the shape of the upper lid. Dr. Kim considers the whole face before suggesting any change to a single corner.

What lateral canthoplasty cannot do

Lateral canthoplasty does not make the eye open wider vertically; that depends on the upper eyelid muscle and the lower lid position. It cannot create conjunctival space that is not there. It cannot move the bony rim of the eye socket, which ultimately limits how far the corner can be extended. And it cannot fully prevent the body's healing from pulling back some of the change. Knowing these limits helps you decide whether the realistic gain is worth a procedure for you.

Preparing and caring for the area

Before surgery, follow instructions on pausing medicines and supplements that increase bruising, avoid smoking and alcohol, and arrive without eye makeup or contact lenses. Afterwards, sleep with your head raised, use cold compresses in the first 48 hours, keep the corners clean, and use prescribed ointment and lubricating drops. Avoid rubbing or pulling the outer corners, for example when removing makeup later, because tension on the healing tissue can encourage relapse. After suture removal, scar care and sun protection are typically advised.

How Dr. Kim assesses the outer corner

Dr. Kim Jun-young personally carries out every step at Will Be. At consultation he gently stretches the outer skin to see how much conjunctiva lies beyond the visible corner, checks the tilt of the eye (the canthal axis), lower-lid tone, the prominence of the eye, and tear quality. He then looks at how the eye relates to the rest of your face: eye width versus the distance between the eyes, cheekbone shape, and brow.

If the assessment suggests little can be gained, you will be told so. An outer corner operation that cannot deliver a visible difference is not worth its risks. When it is suitable, the design is modest and tailored to what your tissues can support. You will see the planned change marked before surgery, and you are always free to choose a smaller correction, or none at all, once you understand the likely gain and the likely relapse.

How is the procedure performed?

1. Marking. The planned new corner position is marked while you look straight ahead.
2. Local anesthesia, with optional sedation.
3. Skin incision. A small horizontal incision is made at the outer corner.
4. Release. Skin and underlying fibrous tissue are released to expose the hidden conjunctiva.
5. Repositioning. The conjunctiva is advanced outward and stitched to the skin to form the new corner. If the aim is to soften an upward tilt, part of the lower lid's canthal attachment may be adjusted and re-anchored.
6. Anti-relapse fixation. Support sutures may be placed to resist the natural tendency of scar tissue to pull the corner back.
7. Closure with fine sutures.

Anesthesia and surgery time

On its own, lateral canthoplasty typically takes 30–60 minutes under local anesthesia, with optional IV sedation. It is often combined with other eye procedures, which extends the total time. You go home the same day.

How long does recovery take?

Why some relapse is expected

Healing tissue contracts. At the outer corner, scar contraction and the natural pull of the canthal tendon tend to draw the newly formed corner back toward its original position. Some degree of relapse after lateral canthoplasty is therefore common, and the amount varies between people. Fixation techniques and careful design help, but it is important to understand before surgery that the visible gain at six months may be smaller than it looks in the first weeks.

This is also why candidate selection matters so much. With enough hidden conjunctiva and good lid support, a modest lasting change is realistic. Without them, relapse can take back most of the gain.

Risks and how they are minimised

Risks include relapse, visible scarring at the outer corner, a rounded or blunted corner shape, redness of exposed conjunctiva, asymmetry, dry eye or irritation, lower-lid malposition such as sagging or pulling down (ectropion), bleeding and infection. Individual results vary, and a small change at the corner can look different between the two sides while swelling persists. These are reduced by selecting suitable candidates only, conservative design, secure fixation, and close follow-up. For an overview, see eyelid surgery risks.

Combining with other procedures

Lateral canthoplasty is often combined with lower canthoplasty, which lowers the outer part of the lower lid, to soften the overall shape of the eye. It may also be combined with double eyelid surgery. It is sometimes considered together with, or instead of, inner-corner surgery; see epicanthoplasty vs lateral canthoplasty to understand how the two differ.

Staying in Korea as an international patient

Plan about 7 days in Seoul: consultation, surgery, a check within a few days, suture removal at around day 5–7, and a final review before flying. Photos sent before you travel help Dr. Kim give a preliminary view of whether your outer corner has enough room for this procedure. After you return, photo follow-up lets healing be monitored. If you are combining outer-corner work with lower canthoplasty or double eyelid surgery, allowing a few extra days is sensible, because the combined swelling takes longer to settle before you fly. See how long to stay in Korea for general planning, and flying after plastic surgery for travel-day advice. When you look at your eyes in the first weeks, remember that the corner will soften and move slightly as tissue settles; judging the result is fairest at around three to six months.