MAY 25

1.90 High Index Lenses

1.90 high index lenses are the thinnest lenses on the market today. With all of the advancements in plastic lens technology, it’s easy to overlook the fact that 1.90 high index lenses have been available in glass for some time.

This material has positives and negatives, but if your main concern is thinness, 1.90 may be the best choice for you. If you are interested in 1.90 high index lenses, here’s what you need to know:

  • If your main desire is thinness, there are no thinner lenses than 1.90 high index.
  • 1.90 high index lenses are only available in glass. Currently, no plastic lens materials reach an index of 1.90.
  • 1.90 is a particularly dense glass material, so the lenses are going to be considerably heavy. If you are planning on ordering 1.90 high index lenses, it’s a good idea to look for a frame with the smallest lens size possible to reduce the weight.
  • 1.90 high index lenses are going to be more expensive than any other lens material.
  • 1.90 high index lenses are generally only available for single vision or progressive prescriptions.
  • Abbe number refers to color aberration, which is the amount that your lens blurs edges and colors, especially in your peripheral vision. Aberration causes things like “color bleeding,” where it seems like a rainbow is peeking out from behind the edge of an object. 1.90 high index lenses generally have the lowest Abbe number of any lens (between 20 and 35), leading to the most (worst) color aberration.
  • Because of its low Abbe value, 1.90 high index is a poor choice if your prescription has prism.
  • 1.90 high index lenses cannot be tinted and are generally only available in clear.
  • Because of their thinness, these lenses are extremely good at getting rid of the “bug eye” and “tiny eyes” look that’s associated with strong prescriptions.
  • 1.90 high index lenses are most useful for extremely high prescriptions.

If you are considering ordering 1.90 high index lenses, it is important to weigh their positives and negatives. These lenses aren’t right for everybody, and most people who go with high index lenses prefer 1.70 high index plastic. If thinness is extremely important to you, your prescription is extremely high (below -10.00 or above +7.00), you are very concerned with having as little of the “bug eye” or “tiny eyes” look as possible, you do not have a prism, and you are comfortable with dealing with color aberration, 1.90 may be the lens for you. If you’d like to see what some other high index lens materials have to offer, you can read about them in our other blog posts. You are sure to find the lens that’s perfect for you.

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