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Materials 1.74(MR-174)

Category: Materials

The 1.74 index is the highest among Schneider’s plastic materials, offering the thinnest and lightest
possible lenses for individuals with high prescriptions. With a significant reduction in edge thickness for
high minus prescriptions and central thickness for high plus prescriptions, this material is the ideal choice
for an aesthetically pleasing look and natural vision.
Other advantages of this material include:
• Maximum thinness for high prescriptions
• Full UV protection
• Suitable for high plus and minus prescriptions
• Ideal for full-rim frames

Key Features Materials 1.74(MR-174):

Thinnest and Lightest Plastic Lens Material Available: Up to %55 thinner and lighter than standard CR-39, making it the ultimate choice for very high prescriptions.

Premium Optical Performance: With an Abbe value of 33, MR-174 delivers sharp vision with controlled chromatic dispersion, outperforming many ultra-thin competitors.

Full UV400 Protection: Built-in UV filter up to 400 nm, blocking %100 of harmful UVA and UVB radiation.

Advanced Coating Compatibility: Designed to work seamlessly with multilayer AR coatings, Blue, Sun, Mirror, and photochromic treatments, ensuring durability and clarity.

Superior Aesthetic Appeal: Reduces edge thickness dramatically, ensuring elegant, slim lenses even in high diopter corrections.

Durable & Reliable: Despite its ultra-thin structure, MR-174 offers stable mechanical performance and excellent resistance to daily wear.

Technical Specifications:

  • Refractive Index: 1.74
  • Abbe Value: 33
  • Specific Gravity: 1.47 g/cm³
  • UV Protection: UV400 built-in (up to 400 nm)
  • Impact Resistance: Good (less than polycarbonate/Trivex, but sufficient for standard eyewear use)
  • Drilling & Mounting: Not recommended for rimless or drill-mount frames due to brittleness – best suited for full-rim and semi-rim frames.

Recommended Applications:

  • High to very high prescriptions (±6.00 D and above), where thickness reduction and lightweight comfortare essential.
  • Premium eyewear collections that demand the thinnest, most aesthetic solution.
  • Best for full-rim and semi-rim frames where lens stability is maintained.
  • Ideal for customers seeking the highest level of cosmetic and optical refinement.