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Product Introduction
Introduction: The Science of UV420 Total Protection
Standard UV protection typically stops at 380nm or 400nm, but modern research shows that High-Energy Visible (HEV) light up to 420nm poses a significant threat to ocular health. Our UV420 Blue Cut Optical Lenses are engineered using advanced molecular technology to provide a "hard stop" at the 420nm threshold. By incorporating specific absorbing agents into the lens substrate, we provide a more robust shield than traditional surface coatings alone. This makes the UV420 series a premium choice for individuals who prioritize long-term preventative care against cataracts and macular degeneration, while maintaining the highest levels of visual clarity.
Beyond protection, these lenses are crafted to offer a superior aesthetic experience. Many UV420 lenses on the market suffer from a noticeable green or purple residual reflection; however, our vacuum ion-plating technology ensures a subtle, professional finish. The material's high Abbe value means minimal chromatic aberration, providing the wearer with crisp, edge-to-edge vision. Whether you are navigating a sun-drenched outdoor environment or a harsh fluorescent office setting, these lenses adapt to provide consistent, all-day relief. They represent the pinnacle of balanced optical engineering—where high-tech protection meets everyday comfort and style.
Specification: UV420 Performance Data
| UV Protection Range | 100% Block up to 420nm (HEV/UV) |
| Material Substrate | High-Density Optical Monomer |
| Light Transmittance | Approx. 98.5% (with HMC) |
| Impact Resistance | FDA Drop Ball Test Compliant |
| Available Indices | 1.56, 1.60, 1.67, 1.74 |
| Coatings | SHMC (Super Hydrophobic Multi-Coated) |
| Base Color | Ultra-Clear (Minimal Yellow Tint) |
Technological Highlights: Premium Monomers and Coating Integrity
- High-Purity Monomer Selection: We exclusively use high-performance monomers (e.g., MR-series) to achieve superior tensile strength and optical purity, resulting in excellent clarity and minimal risk of yellowing over time.
- Precision Liquid Casting Process: The lenses are produced via a controlled liquid casting method that ensures uniform material density and refractive index consistency across the entire blank, which is critical for accurate therapeutic power zones.
- Advanced Vacuum Multi-Coating (SHMC): Coatings are applied in a high-vacuum chamber, using multiple layers of metallic oxides to create a durable, anti-reflective stack. This process guarantees maximum light transmission and minimal glare.
- Thermal Curing Optimization: A slow and precise thermal curing cycle is employed to maximize the material’s resistance to internal stress, ensuring the finished lens remains stable and optically perfect under varying temperature conditions.
- Integrated Peripheral Defocus Geometry: The therapeutic design is engineered into the mold itself for cast lenses, or applied via digital surfacing for semi-finished blanks, guaranteeing the accuracy and consistency of the myopia control zone geometry.
Application: Comprehensive Health Use Cases
- Outdoor Enthusiasts: Superior protection for those moving between indoor and outdoor high-UV environments.
- Children & Teens: Crucial for protecting developing retinas from both natural sunlight and digital screens.
- Post-Surgery Patients: Ideal for eyes requiring maximum protection from HEV light following cataract surgery.
- Graphic Designers: Optimized for those who need UV420 protection without sacrificing color fidelity.
- Daily Commuters: Reduces glare and light scatter from both the sun and artificial street lighting.
Advantage: Elite HEV Shielding
- Extended UV Threshold: Superior 420nm cutoff compared to industry-standard 400nm lenses.
- Substrate-Integrated Protection: The blocking power is in the lens itself, so it won't wear off over time.
- Superior Clarity: High-purity resin ensures maximum light intake for vibrant, sharp vision.
- Blue-Violet Reflection: Specialized coating reflects the most irritating blue-violet light away from the eye.
- Anti-Static & Anti-Smudge: SHMC coating keeps lenses cleaner for longer periods during heavy use.
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Customization
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Complete Customization Capability
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Professional Lens Architecture
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Functional Coating Customization
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Digital Rx Customization
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Branding & Packaging
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Frequently Asked Questions (FAQ)
- Q: What is the difference between UV400 and UV420?
- A: UV420 blocks an additional 20nm of high-energy visible light, which is more damaging to the retina than standard UV.
- Q: Is UV420 better for digital screens?
- A: Yes, it targets the high-energy blue light peak that most digital devices emit.
- Q: Does the lens have a yellow tint?
- A: Our UV420 lenses are formulated to be exceptionally clear with almost no perceptible yellowing.
- Q: Can these lenses be tinted?
- A: Yes, they can be further tinted for sun protection while maintaining UV420 properties.
- Q: Are these available in 1.67 index?
- A: Yes, we highly recommend the 1.67 index for a perfect balance of thinness and UV420 protection.
- Q: Does the coating scratch easily?
- A: No, our SHMC treatment includes a double-sided hard coat for superior scratch resistance.
- Q: Is this suitable for kids?
- A: Highly recommended. Children’s eyes are more transparent to HEV light, making UV420 vital.
- Q: How can I verify the 420nm block?
- A: We provide spectral testing reports and portable UV420 testing cards for our distributors.
- Q: Does it help with night glare?
- A: Yes, by filtering out high-frequency light, it reduces the "halo" effect around streetlights.
- Q: Are these stock or RX only?
- A: We carry a large inventory of stock finished lenses and semi-finished blanks.
Payment and Shipping Policy
- Payment: Flexible terms including T/T Wire, Irrevocable L/C at sight, and PayPal for samples.
- Shipping: Expedited shipping via UPS/DHL for urgent stock orders; sea freight for high-volume manufacturing orders.
- Lead Time: 10-15 working days for production of semi-finished and finished UV420 stock.
- Tracking: Real-time tracking provided for all international air shipments.
- Documentation: Full CO, FDA registration papers, and ISO certification provided with every shipment.
Comprehensive Business Information
| MOQ | 200 Pairs |
| Lead Time | 10-14 Days |
| Packaging | Sealed moisture-proof envelopes in 25-box export cartons. |
| Certifications | CE, FDA, ISO9001:2015, ISO14001. |
| Raw Materials | Japanese-standard Optical Monomers with HEV Additives. |
| Customization | Private label envelope design and custom HMC coating colors. |
