measuring PD and seg. height

Discussion in 'Optometry' started by nobodyknows, Aug 10, 2004.

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  1. nobodyknows

    nobodyknows Member 5+ Year Member

    43
    0
    Jul 29, 2004
    Elk Grove, CA
    How do you take PD and seg. height measurements?
     
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  3. cpw

    cpw It's a boy !!! Moderator Emeritus 10+ Year Member

    13,393
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    Apr 25, 2001
    Tampa
    PD is fairly uncomplicated but would be hard to explain without a diagram.

    Seg height depends on what type of lenses they are (Bifocals, Trifocals, Progressives, etc)
     
  4. lemonhead43

    lemonhead43 Member 10+ Year Member

    36
    0
    Aug 11, 2004
    Orange County, CA
    to measure, its easy if u have a pupilometer.. but if u have a pd stick, a small ruler with mm scale, u cna measure the center or one pupil to the other.. as for seg height.. if its bifocal, measure up to the lower eye lid.. as for single vision such as near sighted or far sighted, just measure directly the center of the pupil.. progressives are the same but you have need to make sure the frame is big enough to accomadate it
     
  5. nobodyknows

    nobodyknows Member 5+ Year Member

    43
    0
    Jul 29, 2004
    Elk Grove, CA
    ideally, you want a seg. height of 15 or more for bifocal right?
     
  6. lemonhead43

    lemonhead43 Member 10+ Year Member

    36
    0
    Aug 11, 2004
    Orange County, CA
    for the most part.. 15 or so could be standard but what i found when i measure for bifocal is that it varies for different people.
     
  7. id1070

    id1070

    1
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    Nov 29, 2009
    PD and Seg height depends on what type of lenses. or go to smartpdmeter.com and see the picture
     
  8. JMU07

    JMU07 5+ Year Member

    1,152
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    Aug 16, 2006
    VA
    I'm going to guess that this person has their PD figured out by now.. six years later...
     
  9. fonziefonz

    fonziefonz 7+ Year Member

    782
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    Dec 3, 2006
    You win internet+1
     
  10. Mewcakes

    Mewcakes SCO c/o 2014 2+ Year Member

    421
    3
    Feb 10, 2010
    Mewing at cakes
    Haha. I hadn't noticed the date at first. I was like "SCCO 2009, huh?"
     
  11. yOyOYoo

    yOyOYoo Member 7+ Year Member

    80
    0
    Oct 3, 2003
    Southern California
    HAHAHA

    I was just about to say, "don't they teach you this at SCCO?"
     

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