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Product Introduction
Extreme Environments: The Science of High-Altitude Protection
The higher you go, the more dangerous the sun becomes. For every 1,000 meters of elevation gain, UV radiation increases by approximately 10-12%. On a glacier or a snowy peak, this is further compounded by the "Albedo Effect," where the snow reflects up to 80% of incident solar radiation back into the eyes. Our High-Altitude Alpine & Ski Lenses are not just sunglasses; they are specialized life-safety equipment designed to prevent Photokeratitis (snow blindness) and long-term retinal damage in the world’s harshest environments. These lenses meet the stringent Category 4 (Cat. 4) standard, allowing only 3% to 8% of visible light to pass through. This extreme level of darkness is necessary to prevent pupil dilation in high-glare fields, which would otherwise allow dangerous amounts of UV and IR (Infrared) energy into the eye.
Technically, these lenses feature a dual-shield system. The outer surface is treated with a high-density "Flash Mirror" coating—often in blue or silver—which reflects high-intensity light away from the lens before it can be absorbed. The inner substrate contains specialized rare-earth minerals that filter out Infrared (IR) radiation. Infrared is the invisible part of the spectrum that carries heat; in high-altitude environments, IR can cause the ocular surface to dry out rapidly and increase the temperature of the internal eye structures. By blocking IR, our lenses provide a "cool vision" effect, significantly reducing eye fatigue during long treks. Furthermore, the lenses are tuned for "Flat Light" conditions. When the sky is overcast on a mountain, it becomes impossible to see terrain changes (dips, ice patches, crevasses). Our Alpine lenses use contrast-enhancing rose or amber base tints to highlight these subtle textures, ensuring the wearer can navigate safely. Finally, every lens is treated with a permanent, cross-linked anti-fog coating on the inner surface to prevent condensation during intense physical exertion in sub-zero temperatures.
Technical Specifications
| Protection Category | Category 4 (Extreme Sun) |
| UV/IR Block | 100% UV400 + 95% Infrared Shield |
| Material | Ultra-Tough Polycarbonate / Trivex |
| Base Tint | Contrast-Optimized Rose/Amber/Grey |
| VLT (Visible Light) | ~5% to 7% |
| Coating | Dual-Sided Anti-Fog + Salt-Water AR |
| Impact Standard | ANSI Z87.1 High-Velocity Rating |
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.
Primary Applications
- High-Altitude Mountaineering: Essential for Everest, Alps, or Andean peaks.
- Glacier Skiing: Maximum protection for high-glare snow fields.
- Arctic/Antarctic Research: Critical for long-term polar exposure.
- High-Desert Trekking: Ideal for high-UV arid environments.
Key Advantages
- Total Solar Shield: Blocks UV, HEV Blue Light, and Infrared Heat.
- Flat-Light Definition: Enhances terrain contours in difficult lighting.
- Anti-Fog Reliability: Won't cloud up during heavy breathing or cold snaps.
- Unbreakable Material: Polycarbonate ensures the eyes are safe from ice shards or falls.
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Customization
Customized For Your
Business
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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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Delivery & Support
Frequently Asked Questions (FAQ)
- Q: Why are these better than standard sunglasses?
- A: They block both extreme UV and Infrared heat, which are much stronger at high altitudes.
- Q: Will they fog up when I am skiing?
- A: No, they feature a permanent hydrophilic anti-fog layer on the inner surface.
- Q: Are they polarized?
- A: Yes, they eliminate 99.9% of blinding glare reflected from snow and ice.
- Q: Can I wear them while driving?
- A: If they are Category 4, they are too dark for driving; Category 3 versions are available.
- Q: Are the lenses shatter-proof?
- A: Yes, they are made from high-impact Trivex or Polycarbonate materials.
- Q: Do they come in mirror colors?
- A: Yes, gold, blue, and silver mirrors are available to reflect additional sunlight.
- Q: Do they protect against "Snow Blindness"?
- A: Yes, they provide 100% protection against the UV rays that cause photokeratitis.
- Q: Can I get these with my prescription?
- A: Yes, we offer digital surfacing for high-wrap sports frames.
- Q: How do I clean the anti-fog coating?
- A: Use only water and a microfiber cloth; avoid harsh chemicals.
- Q: Are they lightweight?
- A: Yes, Trivex is one of the lightest optical materials available.
Payment & Shipping
Standard T/T or L/C terms. Bulk discounts for outdoor equipment retailers and ski clubs. Shipped in ruggedized, climate-controlled packaging to maintain coating integrity.
Business Information
| MOQ | 100 Pairs |
| Lead Time | 15 - 20 Days |
| Certifications | CE EN166, ANSI Z80.3, FDA |
