Is there a big difference between 1.6 and 1.67 lenses?
Is there a big difference between 1.6 and 1.67 lenses?
A mid-index lens of refractive index 1.6, approximately 20% thinner than a standard lens. A high-index lens of refractive index 1.67 will be approx. 33% thinner, whereas a lens with a refractive index of 1.74 will be around 42% thinner.
Does 1.67 high index make a difference?
The difference between 1.67, which is considered regular index and 1.74 is quite small, and really, the only way you'll notice the difference is if you have a prescription below a -6 or above a +4. However, if you are in need of a very strong prescription, it is absolutely worth the additional cost!
Are 1.67 lenses worth it?
The difference between 1.67, which is considered regular index and 1.74 is quite small, and really, the only way you'll notice the difference is if you have a prescription below a -6 or above a +4. However, if you are in need of a very strong prescription, it is absolutely worth the additional cost!
Are 1.61 lenses good?
1.61 High Index For those looking for a more modern look, 1.61 high-index lenses may just fit the bill. These ultra-thin lenses are suitable for relatively thin eyewear frames or prescriptions that have an SPH correction between +/- 4.25 and +/- 6.75, and a CYL correction between +/- 2.25 and +/- 3.00.
Is the a big difference between 1.61 and 1.67 index lenses?
1.67 high-index lenses surpass in thinness and lightness when compared to 1.61 high-index lenses. It helps with eye distortion caused by stronger prescriptions and is ideal for individuals with an SPH correction between +/- 7.00 and +/- 9.00, and a CYL correction between +/- 3.25 and +/- 4.00.
Is there a big difference between 1.6 and 1.67 lens?
A mid-index lens of refractive index 1.6, approximately 20% thinner than a standard lens. A high-index lens of refractive index 1.67 will be approx. 33% thinner, whereas a lens with a refractive index of 1.74 will be around 42% thinner.