1.61 MR-8 Green Coating Single-Vision Finished Lens

1. Excellent Optical Performance    
1.1 Lightweight Design for Comfortable Wear    
This lens has a refractive index of 1.61 (the actual refractive index of MR-8 material is close to 1.60, and it is often marketed as 1.61), which ranks in the medium-to-high range among common resin lens refractive indices. Compared with low-refractive-index lenses (such as those with 1.50 or 1.56 refractive index), when correcting the same diopter, the 1.61 refractive index lens is significantly thinner. For patients with moderate to high myopia (over 400 degrees) or hyperopia, the thinner lens not only reduces the overall weight of the glasses, eases pressure on the nose bridge and ears to enhance wearing comfort, but also eliminates the awkwardness caused by overly thick lens edges. This makes the glasses more sleek and elegant, boosting the wearer’s confidence.    
1.2 Low Dispersion for Clear Vision    
Its Abbe number is usually 40.1. The Abbe number is a key indicator to measure the dispersion degree of a lens—the higher the value, the lower the dispersion. Thanks to this Abbe number, the 1.61 MR-8 lens provides the wearer with clear, natural and realistic visual effects in scenarios requiring high visual accuracy, such as daily reading, watching TV, driving and fine manual work. It reduces issues like blurred color edges and rainbow-like light spots caused by dispersion, effectively relieving eye strain and keeping the eyes comfortable at all times.    

2. High-Quality MR-8 Material    
2.1 Strong Impact Resistance for Safety    
The lens is made of high-performance MR-8 resin material developed by Mitsui Chemicals. Compared with traditional CR-39 resin material, MR-8 is much less likely to break when subjected to external impact, providing reliable safety protection for the wearer’s eyes. It is particularly suitable for people with active lifestyles or those prone to accidental lens collisions, such as athletes, students and individuals who frequently engage in outdoor activities, as it minimizes the risk of eye injury from broken lenses.    
2.2 Heat Resistance and Stable Performance    
MR-8 material has excellent heat resistance. In scenarios with temperature changes—such as glasses being exposed to intense sunlight for a long time in hot summers, or moving from a warm indoor environment to a cold outdoor one in cold winters—MR-8 material can maintain stable physical and optical properties within a wide temperature range. It will not suffer from problems like lens deformation or refractive index change due to temperature fluctuations, ensuring the wearer always enjoys stable and clear vision.    
2.3 Excellent Processability for Diverse Styles    
This material boasts outstanding processability and is suitable for various complex lens processing techniques. Whether for making rimless glasses, semi-rimless glasses or glasses with specially cut shapes, MR-8 material can meet the requirements. Eyewear manufacturers can produce lenses with high fit, elegant appearance and excellent performance according to different frame designs and the wearer’s personalized needs.    

3. Unique Green Coating    
Efficient Anti-Reflection for Enhanced Visual Experience    
The green coating on the lens surface adopts advanced multi-layer anti-reflection technology. By depositing multiple thin films with different refractive indices on the lens surface, it utilizes the principle of light interference to significantly reduce light reflection on the lens surface. Generally, the green coating can lower the lens reflectivity to 1%-2%, greatly improving the lens’s light transmittance. In practical use, more light passes through the lens into the eyes, making objects appear brighter and clearer. In strong light environments—such as direct outdoor sunlight, or indoor settings with strong reflective sources like computer screens or lights—the green coating effectively reduces glare on the lens surface, preventing reflections from interfering with vision and enhancing visual comfort and clarity.