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Product Introduction
Introduction: The Optimal Balance of Thinness and Value
In the hierarchy of high-index lenses, the 1.71 refractive index is widely considered the "sweet spot" for moderate to high prescriptions. Our 1.71 High Index Advanced Resin Lenses offer a significant thickness reduction over 1.60 and 1.67 indices, without the higher cost of 1.74 materials. These lenses are crafted from a specialized thermo-set resin that provides exceptional clarity and a high Abbe value for its index, meaning less chromatic aberration and sharper visual edges.
For distributors and retailers, 1.71 represents a high-value upsell for patients who want ultra-thin lenses but are budget-conscious. The material is incredibly versatile, supporting a wide range of coatings from Blue Cut to Photochromic. Its high tensile strength also makes it an excellent candidate for semi-rimless frames. We have perfected the casting process for 1.71 to ensure consistent purity and surface quality across our entire power range.
Specification: 1.71 Material Data
| Refractive Index | 1.71 (High Index Advanced) |
| Material Type | Thermo-Set Optical Resin |
| Thickness Reduction | ~40% vs. Standard 1.50 Index |
| Abbe Value | 37 |
| UV Protection | 100% UV400 Protection |
| Design | Aspheric Digital Surface |
| Specific Gravity | 1.40 g/cm³ |
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: High-Correction Retail Use
- Moderate Myopia: Excellent for prescriptions between -4.00D and -8.00D.
- Budget-Premium Retail: Ideal for patients seeking a "thinner than average" lens at a mid-range price.
- Semi-Rimless Frames: High durability allows for safe groove-mounting.
- Everyday Professionals: Provides a lightweight, thin aesthetic for full-day office wear.
- Aesthetic-Conscious Patients: Reduces the lens edge visibility in plastic and metal frames.
Advantage: Performance Meets Price
- Cost-Effective Thinness: Offers 1.74-like thinness at a more accessible price point.
- Superior Visual Purity: Higher Abbe value than many 1.67 or 1.74 materials.
- Lightweight Design: Significantly reduces nose pad fatigue compared to lower indices.
- UV400 Shielding: Full solar protection is built into the material structure.
- Stable Durability: Less prone to warping or heat-stress than standard high-index resins.
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Customization
Customized For Your
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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: How does 1.71 compare to 1.67?
- A: It is noticeably thinner and lighter, providing a more premium look for high prescriptions.
- Q: Is 1.71 as clear as standard glass?
- A: It is one of the clearest high-index materials, offering excellent contrast.
- Q: Can these be used in rimless frames?
- A: Yes, 1.71 has excellent tensile strength and is resistant to cracking.
- Q: Do they include anti-scratch coating?
- A: Yes, all our 1.71 lenses come with a double-sided hard multi-coat.
- Q: Are they available as progressives?
- A: Yes, we can produce freeform progressives in the 1.71 material.
- Q: What is the maximum minus power?
- A: We stock up to -10.00D, with custom options going higher.
- Q: Do they block 100% UV?
- A: Yes, UV400 protection is a standard feature.
- Q: Is the material yellow?
- A: No, our 1.71 uses a high-purity clear monomer for a neutral look.
- Q: Does it come with a blue-cut option?
- A: Yes, we offer 1.71 Blue Cut for digital protection.
- Q: Is it heavier than 1.67?
- A: No, it is actually lighter because less material is needed for the same power.
Payment and Shipping Policy
- Payment: T/T, Western Union, or L/C. 30% deposit for large stock orders.
- Shipping: Global sea or air freight. Palletized shipping for bulk blanks available.
- Packaging: Moisture-sealed individual envelopes with index 1.71 marking.
- Lead Time: 7-10 days for stock; 15-20 days for custom RX.
Comprehensive Business Information
| MOQ | 50 Pairs |
| Lead Time | 12-15 Days |
| Packaging | Export-Standard individual branded or neutral envelopes. |
| Certifications | CE, FDA, ISO9001. |
| Raw Materials | Advanced 1.71 Refractive Index Resin. |
| Customization | Specific coating colors and private label envelopes. |
