1.61 Blue Block Progressvie 9+4 Design Finished Lens

1. Progressive Multifocal Design    
Focusing on the three dimensions of "functional adaptability, visual experience, and scene practicality", it can not only make up for the shortcomings of traditional single-vision/bifocal lenses, but also meet the personalized eye needs of different groups of people. 
    
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.    
    
3. Blue Light Protection:    
It is a blue light-blocking lens that can effectively filter high-energy blue light. It is usually labeled as UV420, meaning it can block light with a wavelength of approximately 420nm. In indoor environments, it can efficiently filter harmful blue light emitted by electronic device screens (e.g., mobile phones, computers, tablets). When facing electronic screens for extended periods, it reduces the irritation of blue light on the eye retina, lowering the risks of eye fatigue, dryness, and potential macular degeneration—providing strong protection for eye health in the digital age.