Guide to Children's Eyewear Materials, Choosing Safe Glasses for Your Kids
Selecting eyewear for children involves balancing safety, comfort, and durability. This guide compares the three most common frame materials—TR90, Beta Titanium, and Memory Metal—to help parents make informed decisions.
Expert Comparison of TR90, Beta Titanium & Memory Metal Frames
TR90 Frames
- ✓ Safety: Non-toxic, hypoallergenic, no metal allergy risk
- ✓ Weight: Ultra-light (1/3 of acetate)
- ✓ Flexibility: 180° bendable without damage
- Most cost-effective option
Beta Titanium
- ✓ Safety: Excellent biocompatibility
- ✓ Weight: Light (2nd to TR90)
- ∼ Flexibility: Moderate bending possible
- Premium pricing
Memory Metal
- ! Safety: 10% nickel allergy risk
- ✓ Flexibility: 360° bendability
- ∼ Weight: Moderate
- Specialty pricing
Frequently Asked Questions
TR90 is the unequivocally safest choice for children with sensitive skin or allergy concerns. As a non-metallic, hypoallergenic engineering plastic, it:
- Contains zero nickel or metal allergens
- Meets stringent EU REACH safety standards when properly certified
- Maintains integrity even when fractured (no sharp edges)
Our opticians recommend TR90 for 90% of children under 10 due to its unparalleled safety profile.

Feature | Beta Titanium | TR90 |
---|---|---|
Impact Resistance | Moderate (may dent) | Excellent (springs back) |
Weight | 8-10g | 4-6g |
Aesthetic Options | Premium metallic finishes | Colorful matte/semi-gloss |
Cost | $$$ | $$ |
For style-conscious teens with moderate activity levels, titanium offers sophisticated durability. For athletes or rough users, TR90 often outperforms despite its lower price.
Memory metal (nickel-titanium alloy) serves niche cases when:
- Extreme flexibility is required (e.g., sports goggles worn under helmets)
- The wearer has confirmed nickel tolerance via patch testing
- Professional fitting is available (improper adjustment may cause rebound)

Age-Specific Material Recommendations
3-6 Years
TR90 Only
Prioritize impact resistance and lightweight comfort
7-12 Years
TR90 or Titanium
Introduce premium options for responsible users
13+ Years
TR90 Titanium Memory*
*With confirmed nickel tolerance
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