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Product Introduction
The Pinnacle of Thinness: 1.74 Super-High Index Lenses
For the most severe prescriptions, our 1.74 Super-Thin lenses represent the absolute technological limit for plastic (resin) eyewear. This material is nearly 50% thinner than standard 1.50 lenses, providing an incredible transformation for wearers with high myopia (-6.00D to -15.00D or higher). Crafted from the highest grade MR-174™ monomer, these lenses are as thin as they are technologically advanced. The high refractive index allows light to be bent much more efficiently, meaning less material is required to achieve the same corrective power. To ensure the highest optical quality, every 1.74 lens we produce features a double-aspheric or advanced aspheric design to combat the natural aberrations found in high-index resins. Furthermore, because high-index materials naturally reflect more light, we equip these lenses with a sophisticated 16-layer vacuum-deposited anti-reflective (AR) coating. This ensures that the lenses remain virtually invisible in the frame, allowing the wearer's eyes to be seen clearly without distracting ghosting or glare. Lightweight, ultra-sleek, and optically refined, the 1.74 series is the ultimate choice for patients who want the best that modern optical science has to offer, turning even the strongest prescription into a masterpiece of aesthetic design.
Specification
| Refractive Index | 1.74 (Highest Resin) |
| Material | Ultra-High Index Resin |
| Coating | 16-Layer Premium SHMC |
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
- Extreme Myopia (-7.00D and up)
- High-End Designer Eyewear
- Maximum Weight Reduction
Advantage
- Thinnest Resin Material Possible
- Lightest High-Power Option
- Elegant, Flat Appearance
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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
FAQ
- Q: Is 1.74 the thinnest lens?
- A: It is the thinnest plastic lens; only 1.90 glass is thinner but much heavier.
- Q: How much lighter is it?
- A: It significantly reduces the weight of high-power glasses, preventing nose-bridge strain.
- Q: Does it come in Blue-Cut?
- A: Yes, Blue-Cut is highly recommended for high-power digital users.
- Q: Is there any rainbow effect?
- A: With our premium SHMC coating, chromatic aberration is effectively minimized.
- Q: Can I use 1.74 for rimless?
- A: Yes, but it is slightly more brittle than 1.61; handle with professional care.
- Q: What is the maximum power?
- A: We can produce these up to -15.00D or even higher in custom orders.
- Q: Is UV protection included?
- A: Yes, 100% UV400 protection is standard.
- Q: Why are 1.74 lenses more expensive?
- A: The material and precision casting process are significantly more complex.
- Q: Do they scratch easily?
- A: No, they include a specialized ultra-hard coating to protect the surface.
- Q: Are they available in photochromic?
- A: Yes, 1.74 photochromic options are available for premium orders.
Payment and Shipping Policy
- Payment: T/T, L/C, Western Union, or secure online portals. Standard 30% deposit for bulk production.
- Shipping: Global air/sea logistics via DHL, FedEx, or specialized freight forwarders. FOB/CIF terms available.
- Packaging: Sealed individual moisture-proof lens envelopes in reinforced export cartons.
Comprehensive Business Information
| MOQ | 100 Pairs (Finished) / 200 Pairs (Semi-finished) |
| Lead Time | 7-10 Days (Stock) / 15-20 Days (Custom) |
| Packaging | Export-Standard individual branded or neutral envelopes. |
| Certifications | FDA, CE, ISO9001, Reach. |
| Raw Materials | Premium Optical Resin with UV400/HEV Absorbers. |
| Customization | Brand printing, specific blocking rates, and HMC color options. |
