High index spectacle lenses are thinner and lighter than normal spectacle lenses. This makes them ideal for people with higher prescriptions. Quality lenses in high index plastics and glass are available from Nikon, Zeiss, Hoya. Pentax and Rodenstock and various other companies. Some people are very fussy or very self-conscious about how thick their lenses look. For these people, high index lenses are a great way of reducing the thickness and also the weight. For an even thinner lens, aspheric lenses are available. These lenses are slightly flatter than spherical lenses and this makes the lenses look thinner. The downside with aspheric lenses is that some people ..  Read the complete review

I currently wear spectacles fitted with Nikon DXII aspheric lenses in an ultralite weight Police frame (model 2541, bought from D&A). I wore contact lenses for years and decided it was time to start wearing glasses again (they are very fashionable now) but don't like having a lot of weight on my face. I am quite short sighted (a 5 dioptre myope, ask your optician) and therefore need quite powerful lenses. The Nikon DXII lenses are expensive but are extremely good quality. With all the coatings (anti-reflection, anti-scratch, water repellant) they are among the best lenses available. Being aspheric, they are thinner than standard lenses and being high ...  Read the complete review