Glasses 1.56 1.61 1.67 1.71 Detailed explanation

The refractive index of a lens is an important parameter of the lens, usually with numbers such as 1.49, 1.56, 1.61, 1.67, etc. These numbers represent the optical refractive index of the lens, which means that for lenses of the same degree and material with the same thickness at the center, lenses with higher refractive index have thinner edges than lenses with lower refractive index; The larger the number, the thinner the lens, and the higher the price. 1.49 lenses are not commonly seen on the market, and there are not many varieties, mainly for elderly people who purchase reading glasses. Different degrees are suitable for different refractive indices of lenses. People with myopia within 500 degrees generally choose lenses with a refractive index of 1.56, which have a complete range of types, numerous functions, and are also reasonably priced. If people with myopia above 500 degrees need to consider thickness, it is better to choose lenses with a refractive index of 1.56 non spherical or 1.61 refractive index when purchasing lenses. The following are thickness comparisons of several common refractive indices:

Classification of resin lenses:

Colored resin lenses

Colored resin lenses, also known as dyed resin lenses, are coated on ordinary resin lenses and dyed into various colored lenses with different light transmittance.

1.50 hardened resin lens 1. Super wear-resistant. The surface of the lens is coated with special ultra-fine particle hardening treatment to enhance its wear resistance and extend its service life.

2. Anti UV factor is added to the lens to effectively cut off ultraviolet rays with wavelengths below 350nm, protecting the wearer's eyes.

The comparison between non hardened lenses and hardened lenses. Hardened lenses are coated with special ultrafine particle hardening treatment on the surface of the lens, which enhances its wear resistance and extends its service life.

1.56 hardened resin lens

In terms of the characteristics of 1.499 hardened resin lenses, 1.56 hardened resin lenses have advanced design and adopt physiological bending design, effectively reducing the thickness of the lenses. Moreover, this type of lens is thinner due to its higher refractive index than 1.499.

1.56 Hard Film Resin Lens

Comparison of 1.56 Hard Film Resin Lens without Film and Film

1. It can effectively prevent water droplets from sticking to the surface of the lens.

2. The efficient anti reflection and anti reflection function ensures that the lens transmittance reaches about 97%.

3. Not easy to age, high light transmittance, super strong impact resistance and wear resistance, etc.

4. Coated glasses can reduce the reflected light on the surface of the lens, solve the problem of taking pictures under strong light when wearing glasses, and increase aesthetic appeal.

1.56 hardened and coated anti radiation resin lens

This type of lens is designed and calculated by a computer to achieve the optimal curvature combination, leaving the human eye with no choice

From all angles, it achieves the best visual effect, and the curvature design conforms to the rotation law of the human eye, with a wide field of view. Moreover, after being treated with multiple layers of film, the mirror reflection is reduced, so there is no need to take off glasses when taking photos in the future. Easy to clean, high light transmittance. Anti radiation lenses are treated with special conductive thin films to give them anti electromagnetic radiation properties. Users can avoid eye damage caused by low-frequency radiation. Anti radiation resin sheets are particularly suitable for computer workers.

1.56 hard film anti radiation non spherical resin lens

1. Multi layer film eliminates reflection: eliminates mirror reflection, high transmittance.

2. Wear resistant: It does not have a high surface hardness, making it more convenient and durable to use and maintain.

3. Belonging to radiation resistant health lenses.

4. Non spherical design: corrects the image and reduces visual distortion.

1.60 hard film anti radiation resin non spherical lens

1. Ultra thin volume, transparency, and ultra clear visual experience.

2. Combining non spherical surfaces with 1.60 lens technology for lighter and thinner lenses.

3. Advantages of advanced non spherical design.

4. Technical parameters: 1.60 refractive index lenses have better optical quality than 1.56 refractive index lenses, with a thickness of only 75% of the thickness of 1.56 refractive index lenses.

1.67 high refractive index ultra-thin hard film anti radiation non spherical resin lens

From a large number of statistical data, it is found that the majority of patients wear medium power lenses. Choosing traditional low refractive index lenses often gives people a feeling of being "thick", especially for lenses with high refractive index. 1.67 high refractive index resin lenses are lighter and thinner than ordinary resin lenses.

1. High refractive index combined with flat curved non spherical design, slim and beautiful, while also effectively resisting ultraviolet radiation and reducing infrared radiation, effectively eliminating interference from computers, televisions and other radiation sources.

2. Due to its higher density, it is more wear-resistant, lightweight, less prone to scratches, and lighter. The classification of resin lenses is not fixed, and with the development of science and technology, people are constantly inventing new lenses.