Persistent redness or itching under your frames? You may have contact dermatitis. Our evidence-based guide helps you navigate material risks:
Metal Allergy Decoded
▌Primary Culprit: Nickel Alloys
70% metal frames contain nickel (EU standard: Ni release <0.5μg/cm²/week)
Hypoallergenic Alternatives:
✓ Medical-grade titanium (ISO5832 certified)
✓ Surgical stainless steel (Cr≥18%)
✓ Palladium plating ≥3μm barrier
▌Precious Metal Myths
24K gold is safe but too soft; 18K contains 25% alloy (may include nickel!)
Smart Choices:
✓ Titanium core + gold plating composite
✓ Request “Nickel-Free” certification
Nose Pad Risk Matrix
| Material | Risk Level | Safe Alternatives |
|---|---|---|
| Industrial Silicone | ★★★☆ | Medical-grade silicone |
| PVC with Phthalates | ★★☆☆ | Food-grade TPE |
| Metal Pads | ★★★★ | Micro-porous ceramic |
Plastic Safety Tier (Text Version)
Acetate (Zyl)
Risk Level: Moderate
Allergens: Residual dyes & plasticizers
Precaution: Select OEKO-TEX® certified batches
Propionate
Risk Level: Low
Key Advantage: Plant-based biocompatibility
Ideal For: Children/Sensitive skin
Nylon Blend
Risk Level: Moderate
Concern: Unpolymerized monomer traces
Pre-Use Care: Hand-wash before first wear
Optyl Epoxy
Risk Level: Ultra-Safe
Certification: German medical implant standard
Unique Property: Zero toxin release during heat adjustment
Triple-Shield Protocol
▌Allergen Testing: Dermatologist patch test (focus on Ni/Co/Cr)
▌Barrier Engineering:
Food-grade silicone sleeve on temples
Ceramic nano-porous nose pads
▌Emergency Response: For acute allergic reactions
Immediate Action:
Remove glasses & rinse affected area with saline
Apply cool compress for 10 mins (no direct ice contact)
Medical Treatment:
Topical 0.1% tacrolimus ointment (non-steroidal)
Oral loratadine for itch relief (with prescription)
Frame Replacement:
Switch to titanium frame within 72 hours
Fit with medical-grade silicone nose pads (ISO-10993 compliant)