High Index Eyeglass Lens

Video Transcript

"Another option we’re going to talk about is high index lenses. You can go into to any number of optical stores and they are going to call these high index lenses a whole bunch of different names. A lot of places like to call them featherweights, or lightweights. What it comes down to though is that these lenses are identified by numbers and these numbers are called index of refractions. There is an index of refraction of 1.50 which is just your basic plastic and then the higher the number the thinner the lens and they go up in gradient steps of thin, thinness so to speak. There is a 1.60 and there is a 1.67, if you have over a minus two prescription you might want to consider these options to thin down your lenses. You buy these nice expensive frames but all of a sudden your lenses look really thick in them. High index lenses are going to thin the lens down approximately one to one point five millimeters, per upgrade, so you move from the 1.60 to 1.67, about one to one point five millimeters thickness difference, you’re thinning that lens down. Under a minus two point zero dipolar prescription you’re, you’re not looking at a whole bunch of edge thickness so that’s kind of overkill, if somebody’s offering you that lens, just kind of consider what I’m saying. It may not be worth the bang for the buck to do that but if you’re over a minus two point zero have an associate optician talk to you about your options and what you can do. "