Yes.
MR-8 represents a patented material produced by Japan's Mitsui Optical. More translucent than ordinary resin materials. The lens hardness is also better. Many domestic manufacturers use this raw material. Generally speaking, it is called MR-8 when used on 1.60 and MR-7 when used on 1.67.
Zeiss 1.60 uses Japanese Mitsui Chemicals MR-8 material, Abbe number 40.