This is an aspheric spectacle lens with a refractive index of 1.74. It is coated with HMC and EMI for enhanced resistance. The ultra-thin spectacle lens can be fitted perfectly on most eyewear frames.

• Material: MR-174.
• Abbe value: 33.
• Specific gravity: 1.47.
• Transmittance: 98-99%.
• Abrasion resistance: 6-8H.
• Diameter: 65/70/75mm.
• UV400.
• Water resistant.