Results 1 to 3 of 3

Thread: Edge Polish On Transition Lenses?

  1. #1
    OptiBoard Professional
    Join Date
    Jan 2006
    Location
    HOUSTON
    Occupation
    Other Eyecare-Related Field
    Posts
    106

    Wave Edge Polish On Transition Lenses?

    Are There Any Draw Backs In Edge Polishing Transition Lenses?
    Some One Here Mentioned It Shouldn't Be Done.
    I Need Feed Back.

    Gracias,

    Gil
    "blessed to give; grateful to receive"

  2. #2
    C-10
    Join Date
    Oct 2005
    Location
    Thunder Bay, ON
    Occupation
    Dispensing Optician
    Posts
    202
    no we do it all the time

  3. #3
    Manuf. Lens Surface Treatments
    Join Date
    Aug 2002
    Location
    in Naples FL for the Winter months
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    23,240

    straight from Transitions..........

    Quote Originally Posted by Jim Schafer
    I wrote this CS bulletin back in the early to mid 90's...


    Some patients may notice a darker activated ring around the periphery of their Transitions Lenses. The darker ring will only be encountered under a very limited set of conditions. The conditions required are: open or rimless frames, exposed or polished lens edges, and certain activation (lighting) conditions.

    This ring is NOT due to a defect in the lens or mishandling during surfacing and should not be cause for alarm.
    The darker activated ring is only visible under certain conditions, typically initial activation in low daylight light (low UV conditions). It usually is not visible to the wearer but by someone observing the wearer. In most cases, the condition corrects itself the longer the wearer is outdoors (in 3-5 minutes).
    The darker ring is caused by light rays entering through the thicker, polished edges of certain prescriptions. The light enters through the edge, is reflected off of the back surface of the lens and directed towards the front surface. On Transitions Lenses, this phenomenon results in the photochromic compounds being activated from both the front and the back area of the reflections. As a result, extra photochromic molecules are activated that would normally be shielded, resulting in the darker area. However, the longer the wearer is outdoors, the photochromics on the surface darken to the point the lens is evenly darkened.

    This situation can occur on any photochromic lens.

    For Best Results:
    To minimize the occurrence of this condition, Transitions Optical recommends that labs polish to a satin finish rather than to polish to a high luster finish. This will minimize and diffuse the light entering the lenses and still provide the patient with a cosmetically appealing lens.

    I hope this helps, Call if you have any questions
    Jim
    __________________
    Jim Schafer
    Manager Technical Sales
    800.533.2081x7225
    jschafer@transitions.com
    This was posted by the man from transisitons on the same thread in the general Forum........and comes right from the lions mouth.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. What makes a safety frame safe?
    By Jedi in forum General Optics and Eyecare Discussion Forum
    Replies: 20
    Last Post: 04-03-2011, 09:39 AM
  2. Transitions and AR
    By Jim Schafer in forum Smart Lens Technology by Transitions Optical
    Replies: 14
    Last Post: 07-03-2006, 05:16 AM
  3. Replies: 0
    Last Post: 05-20-2003, 04:06 PM
  4. Replies: 0
    Last Post: 08-14-2002, 12:22 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •