1. Refractive Index & Material    
With a refractive index of 1.56, this lens falls into the medium refractive index category. It balances optical performance while keeping the lens thickness and weight at a reasonable level. Made of resin, the lens offers advantages such as light weight and excellent impact resistance, ensuring more comfortable and safe wearing.

2. Progressive Multifocal Design    
The power on the lens surface gradually transitions from the distance vision zone to the near vision zone. This design provides wearers with clear vision correction for far, intermediate, and near distances. Unlike bifocal or trifocal lenses—where wearers need to frequently shift their visual focus when looking at objects at different distances—this progressive design eliminates the "image jump" phenomenon, enabling smooth visual transition. It is ideal for middle-aged and elderly people, as well as those who need to switch between far and near vision frequently.

3. Features of Green Coating    
Green coating typically adopts HMC (Hard Multi-Coating). This coating has high hardness, which can effectively resist scratches and extend the lens service life. Meanwhile, the green coating reduces light reflection on the lens surface, improves light transmittance for clearer vision, and effectively blocks ultraviolet (UV) rays to protect the eyes from UV damage.

1. Blue Light & UV Protection    
This lens effectively blocks blue light below 420nm and provides 100% protection against both UV-A and UV-B rays. It reduces blue light-induced eye damage, making it suitable for people who use electronic devices for extended periods or are frequently exposed to sunlight.    
    
2. Progressive Multifocal Design    
The lens features multiple focal points, with power gradually transitioning from the distance vision zone to the near vision zone. It delivers clear vision correction for far, intermediate, and near distances, eliminating the "image jump" issue common in bifocal and trifocal lenses. This design ensures smooth visual transition and also offers a more aesthetically pleasing appearance.    
    
3. Material & Coating Advantages    
Material: Most lenses are made of imported resin, which boasts excellent optical and physical properties. It is lightweight, ensuring comfortable wearing.    
Coating: Coatings such as HMC (Hard Multi-Coating) enhance lens hardness to reduce scratches, while also improving light transmittance for clearer vision.    
    
4. Suitable Crowds    
Ideal for people with myopia, hyperopia, or presbyopia who need to frequently switch between far and near vision—such as office workers, teachers, and middle-aged/elderly individuals. It not only meets their daily vision needs at different distances but also protects the eyes from blue light and UV ray damage.

1. Functional Features    
Blue Light & UV Protection: This lens effectively blocks blue light below 420nm and provides 100% protection against both UV-A and UV-B rays. It reduces blue light-induced eye damage, making it suitable for people who use electronic devices for extended periods or are frequently exposed to sunlight.    
Photochromic Function: Adopting photochromic technology, the lens gradually darkens within 1-2 minutes when exposed to ultraviolet (UV) light, blocking approximately 80% of sunlight. When returned indoors, it reverts to transparency within 3-5 minutes.    
Progressive Multifocal Design: The power on the lens surface gradually transitions from the distance vision zone to the near vision zone. This design delivers clear vision correction for far, intermediate, and near distances, eliminating the "image jump" phenomenon common in bifocal and trifocal lenses and ensuring smooth visual transition.

2. Material & Coating Advantages    
Material: The lens is made of resin, which offers advantages such as light weight and excellent impact resistance, ensuring more comfortable and safe wearing.    
Coating:    
SHMC (Super Hard Multi-Coating): Boasts high hardness and wear resistance, effectively resisting scratches and extending the lens service life.    
Airblue Coating (Green Anti-Reflective AR Coating): Reduces light reflection on the lens surface, improves light transmittance for clearer vision, and enhances the lens’s aesthetic appeal.

1. Functional Features    
Photochromic Function: The lens contains photochromic molecules (e.g., naphthopyran-based organic molecules). When exposed to ultraviolet (UV) light, the lens darkens quickly to block intense light; after returning indoors, it reverts to transparency rapidly. This allows adaptation to different light environments and reduces eye fatigue.    
Progressive Multifocal Design: The lens power gradually transitions from the distance vision zone to the near vision zone, providing clear vision correction for far, intermediate, and near distances. It eliminates the "image jump" phenomenon and ensures smooth visual transition, making it suitable for middle-aged and elderly people, as well as those who need to frequently switch between far and near vision.    
    
2. Advantages of Green Coating    
Green coatings are typically HMC (Hard Multi-Coating) or SHMC (Super Hard Multi-Coating):    
HMC Coating: Reduces light reflection on the lens surface, improves light transmittance for clearer vision, and enhances the lens’s wear resistance.    
SHMC Coating: Based on the properties of HMC, it further features water repellency, oil repellency, and anti-static properties, making the lens easier to clean and maintain.    
    
3. Material Advantages    
Most lenses are made of imported resin, which offers excellent optical performance, a high Abbe number, and superior imaging quality. Additionally, it is lightweight and highly impact-resistant, ensuring comfortable and safe wearing.

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.

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.

1. Peripheral Defocus Technology:     
Adopting micro-lens defocus technology, the lens is equipped with numerous micro-lenses. These micro-lenses can focus peripheral light in front of the retina, creating myopic defocus and inhibiting the backward elongation of the eyeball—thereby controlling the progression of myopia.    
    
2. Coating Advantages:     
The coating offers excellent wear resistance, anti-fouling properties, and anti-reflective performance, which extends the lens service life and enhances visual clarity.    
    
3. Material Advantages:    
Made of ultra-bright resin material, it has a higher Abbe number compared to ordinary materials. Its light transmittance can reach up to 98.6%, ensuring clearer vision and more comfortable wearing.    
    
4. Suitable Crowd:     
Mainly applicable to adolescent myopia patients, especially those with rapidly increasing myopic degrees.

1. Bifocal Design    
A classic design type of bifocal lens, its core feature is the circular outline of the near reading area. Through the combination of "distance reading area + circular near reading area", it achieves "one lens, two uses", mainly addressing the dual vision needs of people with myopia/hyperopia and presbyopia.    
    
2. Coating Advantages    
The HMC (Hard Multi-Coating) offers excellent wear resistance, anti-reflective properties, and anti-fouling performance. It reduces glare on the lens surface, improves visual clarity, and also makes the lens more scratch-resistant, extending its service life.

1. Bifocal Design    
The upper part of the lens is the distance vision zone (for viewing distant objects), and the lower part is the near vision zone (for viewing close-up objects). It adopts a flat-top bifocal design—the upper edge of the near vision zone is a horizontal straight line. Compared with round-top bifocals, this design allows wearers to access the near vision field more quickly when looking downward. Additionally, the dividing line is relatively less obvious, resulting in a more natural appearance.    
    
2. Material Advantages    
Made of resin material, the lens features light weight and strong impact resistance, ensuring more comfortable and safe wearing—ideal for long-term daily use. Compared with glass lenses, resin lenses are less likely to break, providing better protection for the eyes against accidental injuries.

1. Photochromic Function    
The photochromic materials in the lens can automatically adjust the tint depth according to the intensity of ambient light. In indoor or low-light environments, the lens remains transparent without affecting normal vision; under strong outdoor light, it darkens rapidly—functioning like sunglasses to block ultraviolet (UV) rays and harsh light, thus protecting the eyes.    
    
2. Bifocal Design    
Adopting a round-top bifocal design, the upper part of the lens is the distance vision zone (for viewing distant objects), and the lower part is the near vision zone (for viewing close-up objects). Compared with flat-top bifocals, the round-shaped reading zone of this design has a less obvious dividing line. However, wearers need to look further downward to obtain the same width of near vision field as that of flat-top bifocals.

1. Photochromic Function    
Its core feature is to automatically adjust the grayscale depth as the ambient light intensity changes. It quickly darkens in strong light (especially ultraviolet light) to block strong light and ultraviolet light; when returning to low light or indoor environment, it gradually returns to transparency without affecting normal vision. Its grayscale characteristics are developed around four dimensions: "response mechanism, color change efficiency, stability, and protection capability."
    
2. Bifocal Design    
Flat-top lenses are one of the mainstream design types of bifocal lenses. Their core feature is a horizontal straight line (flat top) on the upper edge of the near reading area. Through the zoning design of "distance correction area + flat-top near area", they achieve "one lens for two purposes", specifically addressing the dual vision needs of people with myopia/hyperopia and presbyopia.

1. Photochromic Function    
The color depth can be dynamically adjusted according to the ambient light intensity, realizing "one lens with two uses" - it can become darker and serve as sunglasses in strong outdoor light, and return to transparent and serve as ordinary corrective lenses in low indoor light.    
    
2. Bifocal Design    
The edge of the circular near vision zone is a smooth arc. When switching from the distance vision zone to the near vision zone, the line of sight will not encounter a "horizontal straight line dividing line", avoiding the "image jump" (sudden discontinuity of the picture) that may occur with flat-top lenses, and the visual transition is more natural.
    
3. Blue Light Protection:    
It only filters out high-energy short-wave blue light (wavelength 415~455nm, also known as "harmful blue light") that is harmful to the eyes, while retaining low-energy long-wave blue light (wavelength 455~490nm, involved in regulating the biological clock, improving mood, etc.) that is beneficial to the human body, avoiding visual color cast and biological clock disruption caused by "full-band filtering".