Lenses for Spectacles and Sunglasses

There are many exciting advances in the designs and materials for lenses for spectacles and prescription sunglasses:

  • High Index Materials – for thinner and lighter lenses
  • Aspheric Lens Designs – for flatter, less bulgy lenses
  • UV Protection – to prevent the transmission of harmful Ultra Violet Radiation
  • Photosensitive Materials – that change colour in response to sunlight
  • Progressive Lenses – for people who would otherwise need bifocals
  • Occupational Lenses – with special designs for different tasks, like computer operators

Together these provide for thinner and lighter lenses, offering improved optics and sight correction, which is more natural.

One of the newest innovations in lens technology are Progressive lenses. They are sometimes referred to as no-line bifocals, not only do they provide visual correction for distances that traditional bifocals can’t, but they also hide the fact that you even need reading glasses.

Progressive lenses are designed so that the distance prescription is used during straight-ahead gaze and the reading prescription during down-gaze. This then provides a more natural vision without any lines in the lens (which can get in the way on stairs for example).

  • Progressive lenses provide excellent results for most patients.
  • They provide a focus for distance, near and all distances between.
  • Cosmetically they look “younger” with no lines.
  • The vision correction is more natural for the wearer.

New Lenses That Respond to Sunlight

Spectacle lenses with a tint that responds to sunlight (photochromics) have been available since the early 1970’s. However, until recently these lenses were always made from glass.

Now new lightweight colour change lenses are available made from resin (or plastic). There are several different brands but the most widely known is probably Transitions.

  • Photochromic plastic lenses are light weight
  • They respond to suit varying levels of glare
  • They also offer UV protection as a feature of the material
  • The lens surfaces are treated to resist scratching
  • Newer versions also include high index materials for further reductions in weight & thickness.

More information? Contact your local Eyecare Plus optometrist direct on 1300 EYECARE (393 227) or via the web here.