1.67 Vs 1.74 High Index Lenses

High index lenses come in a few different indexes. Which ones should I get?

High Index Lenses: 1.67 Vs 1.74

High index lenses are thinner, lighter, and more appealing than standard lenses, but they come in several different indexes.

If you’re shopping for high index lenses and aren’t sure whether to go for 1.67 or 1.74, we have some information that might help you with your decision.

The main differences between these two lenses are price, thickness, weight, color options, and general appearance. People purchasing 1.67 high index lenses generally either do not have an extremely high prescription or are shopping on a budget. 1.74 high index lenses, on the other hand, are the thinnest and lightest plastic lenses currently in existence.

If you’re trying to decide between 1.67 vs 1.74 high index lenses, here are the differences:

  • 1.74 high index lenses are thinner and lighter than 1.67 high index lenses.
  • 1.67 high index lenses are much less costly compared to 1.74.
  • Though both reduce the eye distortion caused by strong prescriptions (making your eyes look bigger or smaller than they are), 1.74 high index lenses accomplish this better than 1.67 high index lenses do.
  • 1.67 high index lenses are available in more colors: both come in clear, gray tinted, and brown tinted, but only 1.67 comes in Transitions brown or gray.
  • 1.74 high index lenses are better for those looking for the thinnest lens possible; generally, people with extremely high prescriptions choose this option.
  • 1.67 high index lenses are better for those looking to save money or those who do not have extremely high prescriptions. They are also the only choice if you’re looking to get Transitions.

No matter which you choose, your high index lenses are going to be thinner, lighter, more attractive, and more scratch resistant than standard plastic lenses.

Shop High Index Glasses

If you’re shopping for high index lenses and still aren’t sure which type to get, or if you’re looking at some of your other options (1.70, 1.80, 1.90), then you should check out some of our other posts! We have information on all types of high index lenses which is sure to help you make your decision. Also, if you have any questions and would like to ask our staff, you can leave us a question in the comments and we’ll be happy to answer it. Thanks for reading, and happy shopping!

Guide to High Index Lenses 17 Responses to 1.67 Vs 1.74 High Index Lenses
  1. Judy G.
    June 10, 2014 | 6:01 pm

    Please can you tell me which of the high-index
    lenses has the best ABE? Also, do they come
    with anti-reflective, or is this an additional
    cost? Thank you.

    • Kieran Hunt
      July 5, 2014 | 4:02 pm

      Hi Judy,

      1.70 high index plastic is generally considered to have the best balance between Abbe number and index benefits.

      High index is a separate cost on our eyewear.

      Please let me know if you have any other questions!

      Kieran Hunt

  2. Dawne
    June 13, 2014 | 2:47 pm


    The Abbe value does contribute to your visual clarity. Although the Abbe value varies in the index you use as well as material it becomes more of a factor w/the way the glasses are made as well as the shape of the lens,
    Abbe value is just one factor that should trail in only after dealing with the more significant design issues. By optimizing the lens material with aspheric designs and anti reflection— Abbe value and other qualities of materials become minimal issues.
    Anti reflective is highly recommended when getting high index lenses. There is an additional cost for this option.

    When purchasing high index lenses you should keep the shape of the lens as circular or oval as possible, this aides in eliminating the Abbe value becoming a concern as well as decreasing thickness on the edges. You also should consider a frame that has a rim, a thicker rim when the prescription is higher or not the shape as described previously .

    Below is a chart on Abbe Value.

    Have a great day!

    Material Refractive Index Abbe
    1.74 1.74 32
    1.70 1.70 36
    1.67 1.67 32
    1.60 1.60 42
    Polycarbonate 1.59 32
    Trivex 1.53 45
    Standard Plastic 1.50 58

    June 27, 2014 | 11:44 pm

    hi please let me know which i should use 1.67 vs 1.74 lenses because i want thinnest lenses
    can you tell me my prescription here
    sphere od : +300 , os : +300
    cylinder od: -200, os : -275
    AXIS OD:004, OS :165
    add od: +250, os:+250

    thanks Daniel

    • Kieran Hunt
      July 5, 2014 | 4:04 pm

      Hi Daniel,

      1.74 will give you the thinnest lenses with that prescription.

      Kieran Hunt

  4. Mario
    July 26, 2014 | 5:15 pm

    I have always been annoyed by the variation in diffraction index in relation to the colour. In the centred of the glasses all colours are pretty much align, but the closer to the edge the more obvious and annoying the colour separation gets.

    Does index values correlated in some wait with this effect

  5. Thomas
    August 8, 2014 | 4:22 am

    Hello, I am from Brazil and I would like to know which lenses are better for my prescription, 1.67 or 1.74

    Sphere OD: -4.25 , OS: -4.50
    Cylinder OD: -3.75, OS: -3.50
    AXIS OD:180, OS:175

    And how much do they cost in the US? Is it possible to make lenses in the US with prescription made in Brazil?

    Here in Brazil they are very expensive, about US$500 for 1.67 and US$1000 for the 1.74.

    Thank you.

    • Kieran Hunt
      August 12, 2014 | 5:17 pm

      Hi Thomas,

      I would suggest going with 1.74 for this prescription.

      The cost of 1.74 from our sister site, http://www.myeyewear2go.com, can range between $150-$375, depending on your choices of frame and lens options. You can order them on MyEyewear2Go and have them shipped to Brazil.

      If you have any other questions, please let me know!

      Kieran Hunt

  6. Robert
    January 27, 2015 | 3:13 am

    Hello, I would like to know which lenses are better for my prescription, 1.67 or 1.74
    My prescription is:

    Sphere Cylinder AXIS
    R: +075 -125 058
    L: +225 -275 105

    Thank You!

  7. Jessica
    February 4, 2015 | 3:22 pm

    1.67 would work just fine for your RX

  8. Eli
    April 3, 2015 | 5:49 pm

    I would like to get the thinnest lens for my prescription
    which would be better 1.67 or 1.74.
    I have been told that I don’t need 1.74 however, the lense would be too thin and they might crack.
    Is it advisable to use the 1.74 for this prescription or can it be harmful to my vision in the future.

    Sphere OD -2.00 OS – 2.75
    Cylinder OD -1.00 OS -0.50
    Axis OD 180 OS 005



  9. Vi
    April 18, 2015 | 2:08 am

    Hi, my sphere measurements are -4.25 in both eyes, cylinder -1.50 and -1.0, and axis measurements of 30 and 150. I’m getting plastic frames. Will the 1.74 index lenses be too thin and break easily?


  10. Dara
    May 30, 2015 | 5:20 pm

    Hello, I would like to know which lenses are better for my prescription, 1.67 or 1.74
    My prescription is:

    Sphere Cylinder AXIS

    R:-5.75 -1.25 5

    L:-6.00 -1.50 2

  11. Alma
    June 2, 2015 | 3:40 pm

    I would like to know if what lenses is best for me. My prescription are
    OD -8.75 Cyl. -1.00. Axis. 180
    OS -8.00 Cyl. -1.00 Axis. 180

    Thank you


  12. Joe
    July 21, 2015 | 8:21 pm

    I have 3 diopters of prism in each lens. I’m struggling to decide between 1.67 and 1.74. Any thoughts?

  13. Betty de Matteis
    September 22, 2015 | 12:03 am

    Hello, I woul like to know which lenses are better for my prescription 1.67 or 1.74:
    -5.00 +1.00 18 +2.50
    -6.00. +050. 14.5 +2.50

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