Users can select the optimal MR™ material
for their individual needs.

Featuring high refractive index, high Abbe number, low specific gravity, and good tintability,
the MR™ lineup includes lenses with various different refractive indexes.
Choices for MR™ products are made by lens makers based on the intended purpose and desired optical power.
When ordering lenses, look for the MR™ trademark on the lens package or envelope.
Or check with your supplier to determine whether the lenses you order are MR™ lenses.

*All properties are representative measurement figures obtained under specified test methods at Mitsui Chemicals, Inc. and not guaranteed as specifications.

Refractive Index 1.60MR-8™/MR-160DG™

This lineup is standard high R.I. lens materials.
MR-8™ has a high abbe number, means minimal chromatic aberration in the visual periphery
and an ideal balance of properties such as impact resistance and thermal resistance.
MR-160DG™ is made from plant-derived lens materials under Do Green™ series.

Abbe Number νe=41 / Heat Distortion Temp. 118ºC
Abbe Number νe=39 / Heat Distortion Temp. 86ºC

*In addition to the MR-8™ and MR-160DG™, the R.I. 1.60 MR™ lineup include the MR-8™plus, MR-20™, and MR-95™, depending on combination of materials.


We recommend the R.I. 1.60 MR™ for a wide range of designs and purposes and for optical powers ranging from nearsightedness to presbyopia.

Refractive Index 1.67MR-7™/MR-10™

This lineup features a balance of lens thinness, lightness, and high impact resistance.
The MR-7™ offers good tintability. The MR-10™ offers superb thermal resistance.

Abbe Number νe=31 / Heat Distortion Temp. 85ºC
Abbe Number νe=31 / Heat Distortion Temp. 100ºC(MR-10™)

We recommend the R.I. 1.67 MR™ for users who are uncomfortable with thick or heavy high-powered lenses. The MR-7™ with its good tintability is ideal for sunglasses and fashion-oriented glasses. The heat-resistant MR-10™ lens offers added safety for use under challenging temperature conditions.

Refractive Index 1.74MR-174™

This lens material makes it possible to produce ultra-thin lens of the highest refractive index.
Additionally, this Do Green™ product is made using plant-derived materials.

Abbe Number νe=32 / Heat Distortion Temp. 78ºC

We recommend the R.I. 1.74 MR™ for users looking for the ultimate in thinnes, as well as those who are especially eco-conscious or prefer the highest possible quality.