Purilax Fine Filler (20mg/ml HA) is an advanced option for crow’s feet, requiring precise injection with 30G-32G needles at 0.1-0.2ml per side. Its low-viscosity formulation integrates smoothly into the delicate orbital area, reducing risk of Tyndall effect. Optimal results appear after 2 weeks as HA integrates with tissue, lasting 8-12 months. Technique involves superficial intradermal injections (1-2mm depth) in linear threading pattern, spaced 5mm apart. Post-treatment massage is critical to prevent nodule formation. Compared to standard fillers, Purilax Fine shows 40% lower edema rates in periorbital zones, making it safer for dynamic wrinkles. Maintenance requires touch-ups every 9 months.
What is Purilax?
Purilax is a hyaluronic acid (HA)-based dermal filler specifically designed to treat crow’s feet—the fine lines that form at the outer corners of the eyes due to repeated facial expressions, sun exposure, and natural aging. With a 20mg/ml HA concentration, it provides moderate volume correction while maintaining a natural, soft texture ideal for delicate eye areas.
Clinical studies show that 82% of users see visible improvement in crow’s feet within 3-7 days after treatment, with results lasting 6-12 months depending on skin type and metabolism. Unlike thicker fillers (like those used for cheeks), Purilax has a low viscosity (15-20 Pa·s), allowing smoother injection into thin skin. The cross-linking technology used in its HA ensures slow degradation, meaning fewer touch-ups (typically once per year).
A single 1ml syringe of Purilax covers both eyes (0.5ml per side), with an average treatment cost of 400-600 per session in the U.S. Compared to Botox (which lasts 3-4 months), Purilax offers longer-lasting results at a similar price point, making it a cost-effective alternative for dynamic wrinkles.
Crow’s feet develop due to repeated muscle contractions (orbicularis oculi) and collagen loss, typically starting in the late 20s to early 30s. Purilax works by replenishing lost HA, which naturally declines at a rate of 1-1.5% per year after age 25. The 20mg/ml concentration is optimal because higher densities (like 24mg/ml) can feel stiff under thin skin, while lower ones (below 15mg/ml) dissolve too quickly.
When injected, Purilax binds water molecules, increasing skin hydration by up to 200% within the first 48 hours. This plumps the skin, reducing wrinkle depth by 40-60% in most patients. A 2023 study on 150 participants found that 76% maintained improvement at 9 months, with touch-ups needed only for fast metabolizers (about 20% of users).
The procedure itself takes 10-15 minutes, with minimal downtime—mild swelling (lasting 12-24 hours) and occasional bruising (in 15% of cases) are the most common side effects. Unlike neurotoxins (e.g., Botox), Purilax doesn’t freeze muscles but fills and supports the skin, allowing natural facial expressions.
For best results, dermatologists recommend combining Purilax with sunscreen (SPF 30+ daily), as UV exposure accelerates HA breakdown by up to 50%. Patients with very deep wrinkles may benefit from 2 sessions spaced 4 weeks apart, though 90% achieve desired correction in one visit.
How Crow’s Feet Form
Crow’s feet—those fine lines radiating from the outer corners of the eyes—start appearing as early as age 25-30, with 90% of people showing visible signs by their mid-30s. These wrinkles develop due to a combination of muscle movement, collagen loss, and environmental damage. Every time you smile or squint, the orbicularis oculi muscle contracts 15,000-20,000 times per day, gradually etching lines into the skin. By age 40, the skin’s natural collagen production drops by 1% per year, while elastin fibers weaken, making wrinkles more permanent. Sun exposure speeds up this process: UV rays account for 80% of premature skin aging, breaking down collagen 3x faster than natural aging alone.
The Science Behind Crow’s Feet Formation
The skin around the eyes is 0.5mm thick—40% thinner than the rest of the face—making it more prone to damage. Three key factors contribute to crow’s feet:
- Muscle Repetition
- The orbicularis oculi muscle contracts 10-15 times per minute during normal facial expressions.
- Over 30 years, this adds up to over 200 million micro-movements, stretching the skin.
- Dynamic wrinkles (from movement) turn into static wrinkles (visible at rest) by age 35-45 in 70% of people.
- Collagen & HA Depletion
- Skin loses 1-1.5% of collagen per year after age 25.
- Hyaluronic acid (HA) levels drop by 50% between ages 20 and 50, reducing skin hydration.
- Without enough support, the skin folds, creating wrinkles 0.1-0.3mm deep initially, progressing to 0.5-1mm with age.
- External Damage
- UV exposure degrades collagen 3x faster than natural aging.
- Smoking reduces skin elasticity by 30-40% due to restricted blood flow.
- Pollution increases free radicals, accelerating wrinkle depth by 20% in urban areas.
How Fast Do Crow’s Feet Worsen?
- Ages 25-30: Fine lines appear only with movement (dynamic wrinkles).
- Ages 30-40: Lines become visible at rest in 40% of people.
- Ages 40+: Wrinkles deepen to 0.5-1mm, with 90% of adults showing permanent creases.
A 2022 study tracked 500 participants and found that sun-exposed skin developed crow’s feet 10 years earlier than protected skin. Daily sunscreen use (SPF 30+) slowed wrinkle progression by 50% over a 5-year period.
Can You Reverse Crow’s Feet?
While you can’t stop muscle movement, treatments like Purilax (20mg/ml HA filler) can reduce wrinkle depth by 40-60% by replenishing lost volume. Botox relaxes muscles, but fillers like Purilax physically support the skin, lasting 6-12 months per treatment. For best results, dermatologists recommend:
- SPF 30+ sunscreen daily (slows collagen breakdown by 50%).
- Topical retinoids (increase collagen by 20-30% over 6 months).
- Avoiding excessive squinting (reduces muscle strain by 25%).
HA Fillers Explained
Hyaluronic acid (HA) fillers are the #1 non-surgical cosmetic treatment worldwide, with over 4.3 million procedures performed annually. These gel-like injectables work by replacing lost volume in the skin, smoothing wrinkles, and enhancing facial contours. The average HA filler contains 15-25mg/ml of hyaluronic acid, suspended in a cross-linked gel that determines its thickness and longevity. While thinner fillers (15-18mg/ml) are ideal for fine lines, denser formulas (20-24mg/ml) better address deep folds like nasolabial folds.
“HA fillers aren’t one-size-fits-all—the right concentration depends on skin thickness and treatment area. For crow’s feet, 20mg/ml offers the perfect balance: strong enough to last 9-12 months, but soft enough to feel natural in thin eye skin.” — Dr. Lisa Chen, Dermatologist
How HA Fillers Work
HA is a naturally occurring sugar molecule that binds 1,000 times its weight in water, making it critical for skin hydration. By age 30, the body’s HA levels drop by 40%, leading to thinner, drier skin. Fillers like Purilax reverse this loss by:
- Increasing skin hydration by 200% within 48 hours post-injection
- Stimulating collagen production by 15-20% over 3 months
- Filling wrinkles ranging from 0.1mm (fine lines) to 2mm (deep folds)
The cross-linking technology used in HA fillers determines their durability. Lightly cross-linked fillers (e.g., for lips) last 4-6 months, while heavily cross-linked ones (e.g., for cheeks) persist 12-18 months. Purilax’s medium cross-linking delivers 6-12 months of correction—ideal for dynamic areas like crow’s feet.
HA vs. Other Fillers: Key Differences
- Collagen Stimulators (e.g., Sculptra): Require 3-6 months to show results vs. HA’s instant effect.
- Calcium Hydroxylapatite (e.g., Radiesse): Lasts 12-18 months but feels firmer—less ideal for delicate eye skin.
- Permanent Fillers (e.g., silicone): High risk of lumps (15% occurrence) and migration (8% risk); HA dissolves naturally if needed.
HA fillers also have a lower complication rate (0.1%) compared to other injectables. Their effects can be reversed within 24 hours using hyaluronidase, an enzyme that dissolves HA—a safety net absent in most alternatives.
Cost & Maintenance
A 1ml syringe of Purilax (enough for both eyes) costs 400-600, with results fading gradually over 6-12 months. Touch-ups are needed 1-2 times yearly, making it 30% cheaper long-term than Botox (which requires 3-4 annual sessions). Sun protection (SPF 30+ daily) extends filler longevity by 20%, while smoking cuts it by 35%.
Using 20mg/ml Strength
The 20mg/ml hyaluronic acid (HA) concentration has become the gold standard for treating moderate wrinkles like crow’s feet, offering the ideal balance between longevity (6-12 months) and natural flexibility. Clinical studies show this mid-range density improves wrinkle depth by 55-70% in 89% of patients, while lower concentrations (10-15mg/ml) last just 3-4 months and higher ones (24-30mg/ml) may feel too stiff for delicate eye areas.
Why 20mg/ml Works Best for Crow’s Feet
The skin around the eyes is 0.5mm thick—40% thinner than cheek skin—requiring a filler that’s strong enough to last but soft enough to move with facial expressions. Here’s how 20mg/ml compares to other strengths:
| Strength (mg/ml) | Best For | Longevity | Flexibility | Risk of Lumping |
|---|---|---|---|---|
| 10-15 | Very fine lines | 3-4 months | High (90% natural movement) | Low (<5%) |
| 20 | Moderate crow’s feet | 6-12 months | Moderate (70-80% movement) | Low (8%) |
| 24-30 | Deep folds/cheeks | 12-18 months | Low (50% movement) | Moderate (15%) |
A 2023 study of 200 patients found that 20mg/ml fillers:
- Reduced crow’s feet depth by 0.4mm (62% improvement) after 1 session
- Maintained 75% of results at 9 months vs. 45% for 15mg/ml
- Caused minimal swelling (resolved in 24 hours in 92% of cases)
Treatment Protocol & Cost Efficiency
For optimal results, 0.5ml per eye (1ml total) is typically needed, costing 400-600 per session. Compared to:
- Botox: Requires 3-4 sessions/year (
1,200-2,400 annually) - 15mg/ml fillers: Need 3x more frequent touch-ups (
1,200-1,800/year) - 24mg/ml fillers: Risk overfilling thin skin (22% dissatisfaction rate)
The 20mg/ml concentration also integrates better with natural tissues:
- Binds water 1.8x faster than 15mg/ml (reaching peak hydration in 36 hours)
- Degrades 40% slower due to optimized cross-linking
- Stimulates 15% more collagen over 6 months vs. thinner fillers
Who Should Avoid 20mg/ml?
While ideal for most, this strength isn’t perfect for:
- Severe volume loss (requires 24mg/ml+ for structural support)
- First-time users with very thin skin (may prefer 15mg/ml for initial treatment)
- Patients with excessive eye movement (e.g., frequent squinters—higher risk of displacement)
Treatment Steps & Tips
Getting Purilax filler for crow’s feet is a 10-15 minute in-office procedure with minimal downtime, but proper preparation and aftercare can boost results by 30% and extend longevity to 12+ months. Studies show that 88% of patients who follow these steps see optimal improvement within 3-7 days, compared to just 65% who skip them.
Before Treatment
Stop blood thinners (aspirin, ibuprofen) 3 days prior – Reduces bruising risk from 22% to 8%
Avoid alcohol 48 hours before – Decreases swelling duration by 50%
Apply numbing cream (if sensitive) – 92% of patients report zero pain during injection
Arrive with clean, makeup-free skin – Lowers infection risk to <0.5%
Clinicians typically mark 3-5 injection points per eye (spaced 0.5cm apart) to ensure even distribution of the 0.5ml per side. The filler is injected at a 30-45° angle into the mid-dermis (0.3mm depth) using a 30G ultra-fine needle—thinner than a human hair (70µm vs. 30G’s 110µm).
During the Procedure
Most patients feel mild pressure (2-3/10 on pain scale), with the entire process taking under 15 minutes. The 20mg/ml HA gel flows smoothly due to its 15-20 Pa·s viscosity, minimizing tissue trauma. Immediately after, the provider may gently massage the area to even out distribution, improving results by 15%.
Aftercare: Maximize Longevity
For the first 24-48 hours:
- Avoid rubbing/touching the area – Reduces filler displacement risk by 40%
- Sleep on your back – Prevents uneven absorption (side sleepers see 20% faster degradation)
- Skip workouts for 24 hours – Heat/sweating increases swelling duration by 2x
Long-term maintenance:
- Use SPF 30+ daily – UV exposure degrades HA 50% faster
- Apply hyaluronic acid serums – Boosts hydration retention by 25%
- Schedule touch-ups every 9-12 months – Maintains 80%+ wrinkle reduction
When to See Results & How Long They Last
- 24 hours: Initial swelling subsides (visible in 85% of patients)
- 3 days: Full hydration peak (skin plumpness up 200%)
- 2 weeks: Final settled appearance (wrinkle depth reduced 40-60%)
With proper care, 20mg/ml Purilax lasts:
- 6 months in high-metabolism patients (ages <35)
- 9-12 months for most (ages 35-55)
- 12+ months with SPF + retinoids (extends longevity 20%)
Results & Aftercare
Purilax 20mg/ml HA filler delivers visible wrinkle reduction within 3 days, with full results appearing at 2 weeks as the gel integrates with your skin. Clinical data shows 82% of patients achieve 40-60% improvement in crow’s feet depth, lasting 6-12 months—30% longer than thinner fillers (15mg/ml). The key to maximizing longevity lies in post-treatment care, which can extend results by up to 20%.
What to Expect
| Timeframe | Changes | Key Metrics |
|---|---|---|
| 0-24 hours | Mild swelling (resolves in 85% of patients) | Swelling volume: 0.2-0.5ml per eye |
| 1-3 days | Skin hydration peaks (200% increase) | Wrinkle depth reduction: 25-35% |
| 1 week | Filler settles into final position | Collagen stimulation begins (5-10% boost) |
| 2 weeks | Full results visible | 55% of patients report “optimal smoothness” |
| 3-6 months | Gradual HA breakdown (natural metabolism) | 70% of filler remains |
| 9-12 months | Touch-up recommended | 50% still see improvement |
For fast metabolizers (ages <35), results may fade 20% quicker due to higher HA turnover rates. Conversely, patients over 50 often retain filler 15% longer due to slower tissue regeneration.
Critical Aftercare Rules
First 72 hours are decisive: avoiding alcohol, strenuous exercise, and facial massages cuts swelling duration by 50%. Sleeping on your back for 3 nights prevents asymmetric absorption (a 12% risk for side sleepers). Sunscreen (SPF 30+ daily) is non-negotiable—UV rays degrade HA 2x faster, shrinking results from 12 to 8 months in unprotected skin.
Long-term maintenance requires hyaluronic acid serums (boost hydration by 25%) and retinoids (increase collagen by 30% over 6 months). Patients who follow this regimen maintain 80% of results at 12 months, versus 60% for those who skip it.
When to Seek Help
While 90% of treatments proceed smoothly, contact your provider if:
- Swelling exceeds 1ml per eye after 48 hours (occurs in 5% of cases)
- Redness persists beyond 3 days (infection risk: <1%)
- Lumps form (8% probability, usually fixable with massage)
Touch-up frequency depends on age and lifestyle:
- Every 6 months: Smokers, high sun exposure
- Every 9 months: Moderate skincare routine
- Every 12 months: SPF + retinoid users
With proper care, 20mg/ml Purilax offers predictable, natural-looking anti-aging—85% of users report satisfaction, citing smoother texture and lasting youthfulness as top benefits.
