Listing ID #3992990
Company Information
Ask for more detail from the seller
Contact SupplierLike bifocal lenses, multifocal lenses are used primarily to help presbyopic people focus at distance and near with one lens. Multifocal lenses have no segment and no lines in the lenses; the power from the top of the lens to the bottom is smoothly transitioned from distance viewing power through near viewing power, as the user looks downward through the lens. Multifocals have the advantage of offering clear vision over a large range of distances, not just two distances, so multifocal users can see, far, mid-range (computer screen distance) and near all in one lens with no line. Multifocal lenses come in many designs and styles. Typically the multifocal lenses that are the easiest to adapt to and have the widest mid-range and reading areas are more expensive. For people who have not had success adapting to multifocal lenses, it is important to know that there are four factors that determine success in multifocal adaptation:
A multifocal lens gradually changes curvature, thus power as you go towards the bottom of the lens. The sides Outlined are areas where vision may be warped or Distorted due to the severe curvature change; The center areas are where vision is clear; distance At top parts of lens, midrange in middle and near Towards the bottom.