Results 1 to 8 of 8

Thread: Opaque Ring around minus lenses

  1. #1
    Rising Star
    Join Date
    Jan 2008
    Location
    MA
    Occupation
    Dispensing Optician
    Posts
    81

    Opaque Ring around minus lenses

    We are getting noticable opaque rings around minus lenses-even asking for a matte finish does not fix it-any hints? We have tried smaller round frames without success. One lab says to use an incline bevel-our other lab says that will accentuate the opaque rings......

  2. #2
    What's up? drk's Avatar
    Join Date
    Mar 2004
    Location
    Ohio
    Occupation
    Optometrist
    Posts
    7,693
    Material?

  3. #3
    Rising Star
    Join Date
    Jan 2008
    Location
    MA
    Occupation
    Dispensing Optician
    Posts
    81
    2 jobs: first was stock 1.67/ar -8.00 OU
    second was stock asph poly/ar -3.00 and -4.00

  4. #4
    Master OptiBoarder OptiBoard Gold Supporter
    OptiBoard Silver Supporter

    Join Date
    Mar 2012
    Location
    Maryland
    Occupation
    Dispensing Optician
    Posts
    2,001
    someone at the lab doesn't know how to use the variable bevel functions on their edger. I fudged up a couple learning the perfect settings. The real issue here is why are they sending them to you looking like that instead of redoing them?

  5. #5
    OptiWizard
    Join Date
    Feb 2010
    Location
    ALBUQUERQUE
    Occupation
    Optical Wholesale Lab (other positions)
    Posts
    340
    Is the defect @ the bevel apex? Can you post picture of issue

  6. #6
    Master OptiBoarder OptiBoard Gold Supporter
    OptiBoard Silver Supporter

    Join Date
    Mar 2012
    Location
    Maryland
    Occupation
    Dispensing Optician
    Posts
    2,001
    Quote Originally Posted by PRECISIONLAB View Post
    Is the defect @ the bevel apex? Can you post picture of issue
    I bet its the back side angle of the bevel is much too steep and/or the width of the bevel is too small

  7. #7
    OptiWizard
    Join Date
    Feb 2010
    Location
    ALBUQUERQUE
    Occupation
    Optical Wholesale Lab (other positions)
    Posts
    340
    Try using a dressing stick to sharpen bevel wheel. Also check offset value (size differential from rough to bevel stone) If the bevel stone is not cutting efficiently, what you describe is the result.

  8. #8
    Rising Star
    Join Date
    Jan 2008
    Location
    MA
    Occupation
    Dispensing Optician
    Posts
    81
    Thanks for the suggestions!

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. White ring on semi-rimless lenses
    By Lillith84 in forum General Optics and Eyecare Discussion Forum
    Replies: 9
    Last Post: 02-07-2007, 05:41 PM
  2. Minus aspheric lenses...please answer this!
    By drk in forum Ophthalmic Optics
    Replies: 24
    Last Post: 02-02-2007, 10:24 PM
  3. Aspheric vs spheric on minus lenses
    By francisOD in forum General Optics and Eyecare Discussion Forum
    Replies: 2
    Last Post: 06-07-2006, 03:11 PM
  4. Are plus lenses heavier than minus?
    By Robert Martellaro in forum Ophthalmic Optics
    Replies: 35
    Last Post: 12-14-2005, 05:32 PM
  5. Minus lenses in grooved rimless frames
    By Joann Raytar in forum General Optics and Eyecare Discussion Forum
    Replies: 10
    Last Post: 08-02-2004, 08:13 AM

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
  •  
OptiBoard is proudly sponsored by:
Younger Optics and Vision Equipment