Compared to regular eyeglass lenses,high index lenses are superior in several aspects.Thinner,lighter,and much more good aesthetic in appearance.a) Convergent lenses(to correct hyperopia)of the same refractive power have a thinner center thickness when made from higher index.In highly myuopic cases high index can minimize edge thickness.This reduces light entering into edge of the lens,reducing and additional source of internal reflections.This also makes the lenses more cosmetically appealing.b）Since the lenses are made thinner,less material is used,making them lighter

Thanks for your information. I will buy high index lenses for my new prescription glasses as I have a strong prescription and the regular lenses for my prescription are always very thick.