TL;DR: Crow's feet are the fan of fine lines at the outer corners of your eyes. They come from smiling and squinting, and they show up early because the skin there is thinner and folds constantly. They're expression lines, so a peptide made for expression lines, like Argireline®, is a good fit. Pair it with steady hydration and daily sun protection for softer-looking crow's feet over several weeks (results may vary). You don't need to smile less. A good routine softens the look of lines, not your expressions.
What Are Crow's Feet?
If you notice fine lines fanning out from the corners of your eyes when you laugh, those are crow's feet. They're one of the first expression lines most people notice, often starting in their late 20s or 30s.
They form where the muscle that circles your eye contracts every time you smile, squint, or blink hard. The skin over that muscle folds, and over years those folds leave a lasting pattern.
Crow's feet usually start as lines you only see when you smile. With time, they can linger even when your face is relaxed. That shift from moving lines to resting lines is a normal part of how skin changes.
Why the Eye Area Shows Lines First
The skin around your eyes is some of the thinnest on your face, and it moves constantly. That combination is why lines show up there before almost anywhere else.
- Thinner skin: less cushioning means folds are more visible.
- Constant movement: smiling, squinting, and blinking fold this skin all day.
- A drier area: the eye area tends to run drier than the rest of the face, and dry skin makes lines look deeper.
- Sun exposure: squinting in bright light plus UV exposure is a double hit. In a study of nearly 300 women, researchers estimated that sun exposure accounted for about 80% of visible facial aging signs [1].
Can Argireline Help Crow's Feet?
Yes. Argireline helps visibly soften the look of crow's feet with consistent use, and the eye area is where a key randomized study on this peptide was done.
In a randomized, placebo-controlled study, 60 participants applied a 10% Argireline formula or a placebo to the lines around their eyes twice daily for four weeks [2]. The Argireline group showed measurable improvement in the look of wrinkle roughness, measured with skin replicas (detailed molds of the skin's surface). The placebo group didn't show the same improvement.
Argireline (Acetyl Hexapeptide-8) is a lab-made peptide developed specifically for the look of lines that come from movement [3].
The limit: a 2025 research review notes that how well peptides get through the skin's outer barrier depends a lot on the formula [4]. Think softer-looking crow's feet over weeks, not a change you'll see overnight.
How to Use Argireline Around the Eyes
Apply a small amount of Argireline Serum along the outer corners of your eyes, where crow's feet form. Keep it on the orbital bone (the bony ridge you can feel around your eye) rather than on your eyelids or right at the lash line.
- Start with clean, dry skin.
- Dispense 2–3 drops of Argireline Serum onto your fingertips. That's enough for your full face, so use just a little at the eye corners.
- Gently press and pat along the outer corners of your eyes with your ring finger, which naturally applies the lightest pressure. No rubbing or tugging.
- Apply the rest to your forehead, between your brows, face, and neck.
- Let it absorb, then follow with eye serum or moisturizer. Finish with SPF in the morning.
Patch test first: apply a small amount to your neck and wait 24 hours before your first full application, especially if your eye area tends to be sensitive. If any product gets into your eyes, rinse with water.
Where the Hyaluronic Acid Eye Serum Fits
If you want one product built specifically for the eye area, the Hyaluronic Acid Eye Serum already contains Argireline alongside Matrixyl 3000®, Hyaluronic Acid, Niacinamide, and Caffeine.
It's designed for the delicate under-eye and outer-eye area, with a cooling roller tip that glides from the inner to the outer corner. Here's what each active contributes:
- Argireline: targets the look of expression lines like crow's feet
- Matrixyl 3000: supports firmer-looking skin around the eyes
- Hyaluronic Acid: hydrates and helps plump the look of fine dehydration lines
- Niacinamide: helps brighten the look of dark circles
- Caffeine: helps reduce the look of puffiness
Many people use both: Argireline Serum across the face (including the outer eye area), then the Eye Serum rolled under and around the eyes. Both are fragrance-free and designed to layer.
Hydration: The Quickest Visible Win
If your crow's feet look more noticeable by afternoon, dryness is likely part of it. Well-hydrated skin looks plumper, and fine lines look softer almost immediately.
Every Asterwood formula starts with hydration for exactly this reason, and Hyaluronic Acid is the backbone of this one. It's a moisture-binding molecule your skin also makes: it draws water into the skin's surface layers and helps skin hold on to that moisture. The Argireline Serum includes 1% Sodium Hyaluronate, so each application hydrates while it works. Follow with a moisturizer to seal that hydration in.
What to Expect, Week by Week
Hydration shows up right away; softer-looking crow's feet build over weeks of consistent twice-daily use.
- Immediately: The eye area feels hydrated and looks smoother
- 1 week: Fine expression lines can begin to look softer
- 2–4 weeks: A smoother-looking surface; concealer creases less. The eye-area study measured its results at four weeks [2].
- 6–8 weeks: Continued softening in the look of crow's feet
- 12+ weeks: Maximum visible benefit with daily use
Results may vary based on consistency, starting skin condition, age, sun exposure, and other factors.
Everyday Habits for Softer-Looking Crow's Feet
A few simple habits protect the skin around your eyes and help your routine do its job.
- Sunglasses, always. They block UV and cut down on squinting.
- Daily SPF, right up to the orbital bone. The eye area is easy to miss.
- Gentle hands. Pat, don't rub, when applying products or removing makeup.
- Moisturize morning and night. The eye area runs dry, and dryness makes lines look deeper.
- Keep smiling. The goal is softer-looking lines, not fewer expressions.
Can You Prevent Crow's Feet?
You can't stop crow's feet from ever forming. They're a sign of a face that smiles. But you can protect the skin around your eyes and help lines look softer as they appear.
Prevention mostly comes down to the same few habits, started early and kept consistent:
- Protect against the sun. Daily SPF and sunglasses address the biggest outside driver of visible aging [1].
- Keep the area hydrated. A Hyaluronic Acid serum and a moisturizer morning and night help skin look plumper and more resilient.
- Add an expression-line peptide when you're ready. Many people add Argireline when they first notice lines that linger after they smile.
- Be gentle. Tugging and rubbing the eye area adds stress to already delicate skin.
If you're in your 20s and just starting to notice faint lines when you laugh, a simple routine of Hyaluronic Acid, a lightweight peptide serum, and SPF is plenty. As you get older, you can layer in more targeted products like the Hyaluronic Acid Eye Serum.
This article is for educational purposes and does not constitute medical advice. Consult a licensed dermatologist for concerns specific to your skin.
Argireline® is a registered trademark of Lubrizol Advanced Materials (Lipotec). Matrixyl® 3000 is a registered trademark of Sederma.
