Is there a big difference between 1.67 and 1.74 high index lenses?

Is there a big difference between 1.67 and 1.74 high index lenses?

But with regular plastic lenses, a lens treatment is necessary for these lenses to block all Ultra violet rays. This UV treatment does not change the looks of the lenses and is quite inexpensive. It’s around 10X more impact-resistant than high-index lenses and is which means ideal lens material for sports protective eyewear and children’s…

Difference Between Standard Premium And Custom Progressive Lenses

Difference Between Standard Premium And Custom Progressive Lenses

In past times, these lens coatings have been delicate and also have required extreme care to avoid scratches. The most recent generations of anti-reflective coatings are really durable and far superior in performance weighed against their predecessors. Help for presbyopia, a special kind of visual problem for optical engineering – then and now. From their…