MRTM: The lens material favoured by eyeglass makers

MRTM: The lens material favoured by eyeglass makers

MRTM by Mitsui Chemicals India has many distinct properties that make it the most sought-after lens material. It is made by a unique polymerization methodology that facilitates adding functions like control of specific wavelengths or photochromic properties by blending special dyes possible.

The following are some of the features that make it stand out:

1. High Refractive Index

  • MRTM brand of lenses is available in three distinct refractive indexes, namely, 1.60,1.6 and 1.74. Due to this feature, manufactuing of thinner and lighter lenses is easier.

MR high-index lenses

2. Strength

  • MRTM lenses have high impact resistance and static load resistance, making them extremely safe for regular use. These lenses have cleared the US FDA’s drop ball test and the butterfly test for rimless frames.

3. Durability

  • They are resistant to weather conditions, heat, UV radiation, and abrasion. This way, the lens coating does not peel off and the surface also does not suffer chipping, even after long-term usage.

4. Abee Number

  • Abbe number indicates the degree of dispersion of light. As the Abbe number increases, there is less dispersion of light, resulting in reduced chromatic aberration. This improves viewing comfort.

5. Thin & Light

  • Generally, for higher optical powers, eyeglass makers use thicker glasses. But, since high-index lenses like MRTM can bend light more efficiently, they are thinner and extremely lighter. This way, they are highly comfortable for the user.

6. Strain Free

  • MRTM offers minimal stress-strain and thereby provides strain-free vision. This is because of the uniform polymerization of the glass mold of MRTM resin.

Applications of MR Series of lenses

1. It is used in the manufacture of single and progressive ophthalmic lenses. The processability of MRTM lenses enables them to be made into any design.

  • 2. MRTM lenses are used in tinted sunglasses as they have high stability features.
  • 3. They are extremely suitable for making polarized sunglasses.
  • 4. They are suitable for manufacturing sophisticated eyeglasses like rimless frames or high-curve lenses.
  • 5. MRTM lenses are used in making aspherical lenses where a high degree of precision is needed.

How do opticians choose high-index lenses?

Choosing lens materials is a crucial task, and opticians prefer sturdy, long-lasting lenses that also offer stellar clarity. To choose the best high-index lens material, they consider the following:

Mitsui Chemicals lenses properties

●      Abbe Number: Opticians opt for lenses with high Abbe number as they allow lower dispersion of light. This is suitable for making high-clarity lenses that are comfortable to wear.

●     Resistance to cracking: When exposed to pressure or shock, lens material should stay tough and must not crack. The lens material should be able to deform without chipping.

●     Resistance to abrasion: Scratch or abrasion resistance guarantees long life for lenses; therefore, it is another quality that opticians look for in lens materials.


The search for high-quality high-index lens material ends with MRTM. Being made from one-of-a-kind material, Mitsui Chemicals stands as a pioneer in offering enhanced visual experience for users. These lenses are not only multi purpose, but also add more value to the users and the environment. With amazing qualities, MRTM eyeglass lenses are the most preferred by eyeglass manufacturers.


At Mitsui Chemicals, we ensure to follow Blue ValueTM and Rose ValueTM standards. Through our Blue ValueTM standards, we strive to offer the best products that are eco-friendly as well. Throughout the lifecycle of our products, we monitor their environmental impact. This we do as our part to reduce the carbon footprint.


The Rose ValueTM standards help improve the quality of life of people. Our products promote healthy living, protect food and enrich life and society. Our vision is to create a sustainable society in which people enjoy a comfortable and healthy life.


Reach out to us to know more about our product ranges. We would be glad to assist you.

Frequently Asked Questions

Q1: What makes MRTM high-index lenses revolutionary?

A1: MRTM lenses are revolutionary due to their composition of thiourethane resin, offering unprecedented durability and impact resistance. Additionally, they boast unique features such as high refractive index, strength, durability, high Abbe number, thinness, and strain-free vision, making them stand out in the eyeglass lens market.


Q2: How does MRTM differ from traditional lens materials?

A2: MR lenses are distinguished by their composition of thiourethane resin, which grants them exceptional durability and impact resistance. Traditional lens materials may lack these qualities, making MR lenses a superior choice for eyeglass wearers seeking both reliability and visual clarity.


Q3: What are the key features of MRTM lenses?

A3: The key features of MRTM lenses include high refractive index, strength, durability, high Abbe number, thinness, and strain-free vision. These qualities collectively contribute to an enhanced visual experience and long-term comfort for users.


Q4: What are the types of lenses made with high-index MRTM?

A4: High-index MRTM lenses include the environmentally conscious Do GreenTM range, certified by the USDA as a biobased product, and the NeoContrastTM lenses, equipped with light wave control technology to reduce glare and enhance color perception.


Q5: What are the applications of MRTM lenses?

A5: MRTM lenses find applications in various eyewear products, including single and progressive ophthalmic lenses, tinted sunglasses, polarized sunglasses, sophisticated eyeglasses like rimless frames, high-curve lenses, and aspherical lenses requiring precision.


Q6: How do opticians choose high-index lenses?

A6: Opticians prioritize several factors when selecting high-index lenses, including Abbe number, resistance to cracking, and resistance to abrasion. MRTM lenses from Mitsui Chemicals excel in all these areas, making them a preferred choice for opticians seeking quality and durability.


Q7: What environmental standards does Mitsui Chemicals adhere to?

A7: Mitsui Chemicals follows Blue ValueTM and Rose ValueTM standards. Blue ValueTM emphasizes eco-friendliness, ensuring minimal environmental impact throughout a product's lifecycle. Rose ValueTM focuses on enhancing quality of life by promoting healthy living, protecting food, and enriching society.


Mitsui Chemicals India Pvt. Ltd.