In short. A crease that vanishes when the face is still and a line that stays are different problems. Separating them decides what any treatment can reach.
Key points
- Does the line disappear when the face is completely still, and is the surrounding skin fine-grained and resilient or thin and crepey?
- The first answers the muscle question, the second answers the skin question, and together they predict most of what a plan can change.
Two people look at the same kind of line and use the same word for it. In one the line is made by a muscle folding the skin. In the other the skin itself has changed, and the muscle is not why the line is visible.
The line that goes when the face is still
Ask someone to smile, then to relax completely. A line that appears on smiling and vanishes on relaxing is being made by the orbicularis oculi contracting and folding the skin over it. It is a crease rather than a change in the skin, and it is the part that responds to reducing the pull of that muscle.
The line that stays
A line still faintly visible with the face entirely at rest is a change in the skin. The dermis has lost collagen and elastin, the surface has thinned, and a fold that used to be transient has become a feature of the surface. Sun exposure is the largest single contributor, which is why a static component appears years after the dynamic one.
Most faces have both, in proportions
An eye corner is rarely one or the other. A young face with a strong squint has almost purely the muscle component. A heavily sun-exposed face of seventy has a large skin component and often less muscle pull than it once had. Most people sit between the two.
Two questions that separate them
Does the line disappear when the face is completely still, and is the surrounding skin fine-grained and resilient or thin and crepey? The first answers the muscle question, the second answers the skin question, and together they predict most of what a plan can change.
Why confusing them is the commonest disappointment
A person whose line is largely a change in the skin asks for the muscle to be treated, and afterwards the line is still there because the muscle was never the main cause. The reverse happens too: someone with a strong muscular fold is sold a course of surface treatment, and the fold keeps forming whenever they smile.
Where the balance is unusual
A face with a strong muscle component and good skin often has lines that look dramatic on smiling and are almost absent at rest. A face with a large skin component and a weaker muscle has lines that look similar in both states, finer and more numerous rather than deep.
What not to conclude from the mirror
- That a line vanishing at rest means any muscle treatment is safe at the lid.
- That a line visible at rest means the muscle had nothing to do with it.
- That the split can be judged from a photograph, which records one moment in one light.
What the muscle does and why the fan runs outward is explained in why crow's feet form at the eye corner. How a clinician estimates the split is described in how crow's feet are assessed.
Frequently asked questions
How can I tell how much of my line is muscle?
Look at the eye corner in a mirror with the face completely relaxed, then smile and squint deliberately. The difference between the two is the muscle component: whatever disappears when the face is still was being made by the muscle. Whatever remains in the still face is a change in the skin itself. Most people find the split is not the one they expected.
If the line disappears at rest, does that mean treatment is straightforward?
It means the mechanism is clear, and it does not mean the result is simple. Reducing the pull of the orbicularis oculi softens a crease that the muscle makes, but the muscle has other jobs at the lid, the effect fades over months as the movement returns, and the skin here is unforgiving of anything placed or performed clumsily. A clear mechanism is the start of the conversation.
Can the skin component be made worse by treating the muscle?
It is not made worse by the treatment itself, but it can be left more visible. When the crease flattens, attention moves to whatever is still there, and a person who expected the whole line to go can read a static component that was always present as a failure. That is the commonest disappointment in this area, and it is a matter of what was described beforehand.
Risks & Limitations
- Nothing erases crow's feet. The lines soften with treatment and return as the orbicularis oculi keeps folding the skin.
- Reducing the pull of the muscle at the eye corner can affect lid closure, the tear film and the position of the brow.
- Material placed near the eye corner can show through thin skin, and this is one of the least forgiving areas of the face.
- Resurfacing thin periorbital skin carries a risk of pigment change, redness that persists and, rarely, scarring.
- Treatment in this area is repeated rather than completed, and the decision is remade each time the movement returns.
When to Seek Care
- Difficulty breathing or chest pain — seek emergency care immediately.
- A change in vision, double vision, or pain on moving the eye after treatment to this area.
- An eye that has become dry, gritty or painful, with a lid that no longer closes comfortably.
- Lines that have appeared on one side only, a lid that has begun to droop, or a brow that has fallen.
- A new lump or swelling at the corner of the eye, or a patch of skin that bleeds, crusts or does not heal.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — procedure and safety guidance
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
- Cochrane Library — systematic reviews
- Chinese Medical Association Plastic Surgery Branch — clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.