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Product Introduction
The Absolute Pinnacle of Optical Thinness and Clarity
For patients with severe myopia, the limitations of plastic and resin lenses are a constant struggle. Even at the highest resin index of 1.74, extreme prescriptions can result in lenses that are bulky, aesthetically unpleasing, and prone to "peripheral rings" or distortion. Our 1.90 Ultra-High Index Mineral Glass represents the final frontier of spectacle lens engineering. This material is the thinnest optical medium ever mass-produced for the human eye. By utilizing a specialized lanthanum-heavy glass composition, we achieve a refractive index of 1.90, allowing for a lens that is significantly thinner than even the highest-end plastics. For a prescription of -15.00D, a 1.90 mineral lens can be up to 60% thinner at the edge than a standard 1.50 index lens and approximately 15-20% thinner than a 1.74 resin lens.
Beyond the incredible aesthetics, mineral glass offers optical properties that resin simply cannot replicate. Glass is naturally more scratch-resistant than any plastic coating, maintaining its surface integrity for years under normal use. Its thermal stability is exceptional, meaning the lens will not warp or degrade in high-temperature environments. Furthermore, mineral glass provides a level of "visual crispness"—the image through a high-purity glass lens is often described by patients as more vivid and stable. While glass is heavier than resin, the 1.90 series is designed for users who prioritize the thinnest possible profile and superior durability. To counteract the weight, we recommend pairing these lenses with high-quality titanium frames featuring stable bridge designs. Each lens is processed through precise "Cold-Grinding" and multi-stage polishing to ensure the highest surface quality. This is a boutique optical product, catering to a niche of users who refuse to compromise on visual precision or the elegant look of an ultra-thin lens. It is the definitive solution for high-myopia corrections ranging from -10.00D to -25.00D.
Technical Specifications
| Refractive Index | 1.90 (World's Highest) |
| Material Type | Lanthanum Mineral Glass |
| Thickness Reduction | ~60% vs. 1.50 Index |
| Abbe Value | 30.4 |
| Density | 4.02 g/cm³ |
| Coating | Multi-Layer Vacuum AR (Anti-Reflective) |
| Prescription Range | -10.00D to -25.00D (Standard) |
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
- Extreme Myopia: Best-in-class thinness for very high minus prescriptions.
- High-Precision Professionals: Users who require maximum scratch resistance.
- Aesthetic Focus: High-correction patients wanting to use thin-rimmed frames.
- Extreme Environments: High-heat or chemical-heavy industrial workspaces.
Key Advantages
- Unmatched Thinness: No lens in the world is thinner for high prescriptions.
- Ultimate Scratch Resistance: Glass is naturally harder than any resin.
- Thermal Stability: No warping or coating "crazing" from heat.
- Aesthetic Appeal: Eliminates the "thick bottle-bottom" look of high-power glasses.
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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: Is this the thinnest lens available?
- A: Yes, 1.90 is the highest refractive index currently possible in optics.
- Q: Is it much heavier than plastic?
- A: Mineral glass is significantly denser and heavier than resin lenses.
- Q: Does it scratch easily?
- A: No, mineral glass is extremely hard and highly resistant to surface scratches.
- Q: Can these lenses break?
- A: They are chemically tempered, but glass remains more brittle than polycarbonate.
- Q: Can I put these in a rimless frame?
- A: We do not recommend rimless or semi-rimless frames for 1.90 glass.
- Q: Do they come with anti-glare?
- A: Yes, a specialized vacuum AR coating is applied to maximize transmission.
- Q: What is the maximum prescription range?
- A: They are ideal for high myopia, typically from -10.00D to -25.00D.
- Q: Will the lenses look yellow?
- A: No, high-grade lanthanum glass maintains excellent clarity.
- Q: Are they suitable for sports?
- A: No, we recommend resin or Trivex for any high-impact activities.
- Q: How long does production take?
- A: Due to precision grinding, expect a lead time of 3 to 4 weeks.
Payment & Shipping
50% deposit required for custom glass casting. Shipped in high-security, shock-absorbent wooden or foam-lined crates. Fully insured against transit breakage.
Business Information
| MOQ | 10 Pairs |
| Lead Time | 21 - 30 Days |
| Certifications | CE, FDA, ISO9001 |
