1.61 Progressvie 9+4 Design Finished Lens

1. Progressive Multifocal   
The lens power gradually transitions from the distance vision zone to the near vision zone. The "9+4 design" is our efficiently co-developed progressive design model. This design provides wearers with clear vision correction for far, intermediate, and near distances, ensuring smooth visual transition. It is suitable for middle-aged and elderly people, as well as those who need to frequently switch between far and near vision.    
    
2. Optical Performance    
With a refractive index of 1.61, this lens falls into the medium-to-high refractive index category. Compared with lenses with a 1.56 refractive index, it is thinner and lighter, making it suitable for patients with moderate to high myopia. Although its Abbe number is slightly lower than that of low-refractive index lenses, it can usually still meet the visual clarity requirements for daily use.