Recommended series: Lutina series
 
Also from Japan, Tokai lenses are far less well-known in China than TAG Heuer. In fact, Tokai Lenses, which has a 16% market share in Japan, is not an unknown person, and is the third leader of Japanese lens brands after TAG Heuer and Nikon.
 
Unlike TAG Heuer's global production model, Tokai's lenses are made in Japan from materials, design and processing, with a 100% Made in Japan quality guarantee. At present, the world's highest refractive index of 1.76 pair of aspherical lenses is from the East China Sea, equipped with SPS shield super film, the surface of the lens is smooth, and the starting price is about 5000 yuan. In fact, for low-to-medium power wearers below 850 degrees, the actual thinness of 1.76 is comparable to that of 1.74, and the difference can be felt more when wearing a height number.
 
On the basis of 1.76 pairs of aspherical lenses, Tokai has developed the MODECINQ deep base arc, which is a high-curvature inner aspherical design. Compared with general aspherical lenses, the deep base arc has a higher curvature on the surface curvature, which is suitable for various high-curved frames, allowing people with high height and high astigmatism to have a more free choice of frames when dispensing glasses.
 
According to the inspection and certification of ITRI and SGS, the Lutina artificial lutein lens launched by Donghai has a blocking rate of 94% for blue-violet light, which is more credible and rigorous than the anti-blue light lens on the market without specific data. This series of lenses is based on a substrate to block blue-violet light, and uses a unique technology to balance the three primary colors, and there is less yellowing of traditional anti-blue light lenses, but the light transmittance is still not as good as that of Zeiss. Another disadvantage is that the lens curing process in Donghai is slightly inferior, and the lens yellows quickly, and it will be replaced in about a year, and the service life is not long.
 
The flaws are not hidden, Donghai is very strong in innovative technology, and even more cost-effective than TAG Heuer, which is known for its cost performance, but the promotion in the Chinese market is small, and the brand image is relatively unfamiliar. Seiko lenses, which are also from Japan, belong to the same position gradient as Tokai, and the quality of the lenses produced is stable, and the price is slightly higher, both of which are difficult to buy in the domestic market.