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1.56 High Definition Optical Lenses - Green Coating from China Suppliers and Factory for Myopia and Astigmatism Correction
Data
| Product | High Definition lens | Index | 1.553 |
| Material | Resin | Abbe Value | 34 |
| Diameter | 65/70 | Coating | HMC Green coating |
Performance
Anti-fingerprint
Waterproof
High transmittance
Wear resistance
Anti reflection
UV protection
Lens Refractive Index
It refers to the ratio of the propagation speed of light in vacuum to the propagation speed of light in the lens material.
It reflects the refractive power of the lens towards light.
The higher the refractive index, the stronger the refractive power of the lens towards light.
When choosing the refractive index of a lens, the following factors can be considered:
Degree:
For low myopia below 200 degrees, a refractive index of 1.50 or 1.56 can be chosen;
For myopia between 200-400 degrees, a refractive index of 1.56 or 1.60 can be chosen;
For myopia between 400-600 degrees, a refractive index of 1.60 or 1.67 is more suitable;
For high myopia at 600-1000 degrees, it is recommended to choose a refractive index of 1.67 or 1.71.
For myopia exceeding 1000 degrees, glass lenses with refractive indices of 1.71 or 1.74, or even higher, can be considered.
Frame Size:
If you choose a larger frame, in order to ensure that the edges of the lens are not too thick, you may need to choose a slightly higher refractive index.
The relationship between the refractive index of lenses and the thickness and weight of lenses:
Assuming all other parameters are the same, the higher the refractive index of the lens, the thinner the edge thickness of the lens, and the lighter the lens.
Advantages and disadvantages of different refractive indices:
High refractive index lenses can make the lenses thinner, lighter, and more comfortable to wear.
However, high refractive index lenses are usually more expensive and the dispersion phenomenon may be more pronounced.
With the advancement of material technology, this law is gradually being broken.
For example, the Abbe number of lenses with a refractive index of 1.71 is higher than that of most lenses with a refractive index of 1.56 and 1.67.
Frequently Asked Questions
What is the refractive index of this High Definition lens?
The refractive index of this High Definition resin lens is 1.553.
What key performance benefits does this lens offer?
This lens features HMC Green coating and provides anti-fingerprint, waterproof, high transmittance, wear resistance, anti-reflection, and UV protection properties.
How does the lens refractive index affect its thickness and weight?
Assuming all other parameters remain the same, a higher refractive index results in a thinner edge thickness and a lighter weight, making the lens more comfortable to wear.
What refractive index is recommended for high myopia (600 to 1000 degrees)?
For high myopia between 600 and 1000 degrees, it is recommended to choose a refractive index of 1.67 or 1.71 to keep the lenses thin and light.
Does the frame size influence the choice of refractive index?
Yes. If you choose a larger frame, you may need a slightly higher refractive index to ensure that the outer edges of the lenses do not become excessively thick.