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 43 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

  14. Rab
    January 24, 2016 | 7:00 pm

    My eyesight is very low it is actually -12
    can you please tell me if i can get thin lenses for my glasses and how much it would cost me?
    Thank you

    • Ryan Phillips
      January 25, 2016 | 8:59 pm


      yes we can make thinner lenses for you. With your prescription they will still be on the thicker side but we can do our best. If you would like to find out the thickness and cost please call Kyle Ferris at 732-227-4225 or you can email him at kferris@phillips-safety.com he can give you all the information you need to make a educated decision.

  15. Michael
    February 29, 2016 | 8:30 am


    How thick can a -11.0 1.74 high index lenses be?

    • Ryan Phillips
      February 29, 2016 | 2:39 pm

      The Thickness of the Lens will be really dependent on the frame that you choose. The smaller the frame the thinner the edges will be. Think of it like two intersecting lines the further from the intersect the wider the gap becomes same principle applies with the lens. If you pick out a frame and contact Kyle Ferris at 732-227-4225 or you can email him at kferris@phillips-safety.com he can run the numbers and let you know what thickness your edges will be.

  16. Demerriel
    June 30, 2016 | 12:26 am

    I was wondering which high index lenses would be better for my prescription

    OD -12.75 cyl -2.50 axis 020
    OS -12.00 cyl -2.75 axis 160

    • Ryan Phillips
      June 30, 2016 | 2:22 pm


      The best choice for your prescription are 1.74 index lenses.

  17. Wasim akram
    July 19, 2016 | 9:05 pm

    My prescription is :
    -4.25 S and -0.75 C right
    -5.0. S and -0.25 C left

    Which lens will be more suitable for my vision and are there any sideeffects/negatives or problems associated with wearing 1.74 lenses?

    • Ryan Phillips
      July 21, 2016 | 3:37 pm

      That is not a very high prescription. The 1.67 might be OK for you as well and has more frame options.

  18. Murad
    August 12, 2016 | 4:23 am

    Which lences are good for the number-13.5sph’-0.50 cyl,160 axis where available in india??

    • Ryan Phillips
      August 18, 2016 | 12:58 pm

      Hi Murad,

      For your prescription you could go the 1.74 in plastic or the 1.90 glass. Unfortunately I can only advise as to what we offer for our lab. I am not sure of places in India who carry high index lenses. Try contacting some local eye shops and see if it is a material that they carry.

  19. Shahbaz Siddique
    August 25, 2016 | 7:30 am

    Hello there,

    I have -3.5 both eyes. Earlier i had used crizal a2 by essilor bought for good money, and recently when i had to change it, i went with a regular non branded antiglare lens and found out the thickness is exactly the same, and the optician told even if it says thin, it is only thinner from the centre, which makes no sense to me as the bad look of a lens from its sides not getting on to the frame, so he says it is the same no matter you buy regular or expensive lens.

    My question being, will it make a difference if i again buy -3.5 powered premium thin lens which has 1.67 or 1.74 index? Will the sides be thinner enough to go into a thin full frame? Or will it stay out still like my current 1.5 indexed lens does?

    • Ryan Phillips
      September 16, 2016 | 8:33 pm

      Hi Shahbaz,

      The lenses will still stick out somewhat on the sides no matter which brand of lens you decide to go with

  20. tennielle
    August 26, 2016 | 6:27 am


    I’ve found your details on a website regarding high index lenses.

    My little boy Harrison is wearing thick glasses because he had cataracts removed and now he is aphaikick. (Picture attached)

    He is wearing a 1.67 currently. His prescription is attached. Its a +17 with a bifocal in round segment of +2.50

    He has a cylinder in one eye as well of 0.75

    Please can you tell me if you can make this? If so. Please can you let me know if you ship to Australia. And the cost? I’m in Perth, Western Australia. We don’t have anyone making these in Australia. 

    • Ryan Phillips
      September 2, 2016 | 1:06 pm

      It may take some time, but we may be able to make prescription lenses in the 1.74 for your son. Please contact our high index specialist Jessica at jessica@phillips-safety.com and she will be able to set you up with getting everything put together for you.

  21. richard
    September 1, 2016 | 12:38 pm

    i’ve just had an eye test from specsaver and found my eyes have deterioated from +3 to +3.5.

    my issue is that im concious of how thick my glasses look already and this will be worse.

    Specsaver tell me that there isnt much i can do to reduce the thickness more than they already do.
    BUPA tell me their approach and material will guarantee a thinner look.

    what is the best store to use? is there any benefit in me getting 1.74 v 1.60. some say the difference is negligible

    • Ryan Phillips
      September 16, 2016 | 8:46 pm

      Hi Richard,

      I’m sorry I cannot say which one would be the best place to go with because we have our own optical lab as well. While your prescription is starting to get on the higher side, you wouldn’t really notice a difference between the thickness of the 2 materials until you started to hit +5.00 or so. If you would like to take a look at our website for your frames and high index lenses, it is myeyewear2go.com

  22. Tyson
    September 6, 2016 | 8:59 pm

    I have debated whether to get 1.67 or 1.74 high index lenses for my next pair of glasses. I have been told in two separate occasions that I should go with the 1.67 instead of the 1.74 based on my prescription. I was told that I would see little, or no, additional reduction in thickness for the price increase. Yet, I truly want to get the thinnest and lightest glasses I can. What are your thoughts? What would you recommend?

    Prescription- Right: +3.75 (Sph.) -3.75 (Cyl.) 176 (Axis) & Left: +4.75 (Sph.) -4.75 (Cyl.) 010 (Axis)

    Thank you.

    • Ryan Phillips
      September 16, 2016 | 8:51 pm

      Hi Tyson,

      I would stay with the 1.67. You won’t notice a big difference between the 2 materials as far as thickness goes.

  23. mahesh
    September 12, 2016 | 3:37 pm

    power glass of -12D with index of 1.74 price

    • Ryan Phillips
      September 16, 2016 | 8:52 pm

      Hi Mahesh,

      Just for the material the cost is $95 for 1.74. The cost of single vision or a bifocal and any coatings would be extra. Here is a link to our website to research the pricing a little bit more: myeyewear2go.com

  24. Ramin
    October 27, 2016 | 5:44 am

    My prescription:

    OD: -4.5 (Sphere), -1.00 (CYL), 040 (AXE), VA (6/6).
    OS: -4.75 (Sphere), -0.75 (CYL), 148 (AXE), VA (6/6).

    Assuming I order a round pair of glasses with 55mm lens diameter. Can you tell me how heavy would be a High Index 1.9 glass? How thick would it be on the border where it meets the frame? And if I switch to a 51mm diameter frame?

    Can you tell me the brand of this HD 1.9 glasses?


    • Ryan Phillips
      November 3, 2016 | 7:12 pm

      Hi Ramin,

      I would not be able to say the weight or thickness of the lenses without us making them and installing into the frame. Our high index 1.90 lenses are manufactured by Corning. I’m not sure what brand drs in your area use. You would have to verify with them.

  25. Loredana
    October 31, 2016 | 9:03 am

    Hi Ryan,

    I have -6.5 both eyes. I need to know if the difference between Stylis Crizal Prevencia 1.67 and Hoya 1.74 is significant or not (can you give me the value in mm?).
    Also, i use a lot the computer and I know that it’s useful the PC filter. Now Stylis Crizal Prevencia from Essilor has not such kind of filter, but Hoya has the Blue Control. Some kind of rumors are saying that we don’t quite need the PC filter… Could you advise for all above?


    • Ryan Phillips
      November 4, 2016 | 12:27 pm

      There are many variables. With a -6.50 Speherical correction with no cylinder in a 48-16-135 frame the edge thickness would be 4.1mm for the 1.74 and 4.4mm for the 1.67 with either having a center thickness of 1.5mm That would change depending on the frame. The blue blocking lenses are a good idea if you are exposed to a lot of the HEV light.

  26. ravi kant
    November 11, 2016 | 3:15 pm

    hi there..i am bit confuse about 1.67 & 1.74..please suggest me..my power descriptions are as follows..
    right eye –
    sph 5.5 cyl 1.0 axis 10 VA 6/6P
    SPH 6.0 CYL 1.0 AXIS 120 VA 6/18P

    • Ryan Phillips
      November 16, 2016 | 3:28 pm

      Hi Ravi,

      With your prescription, the 1.74 would provide you with a thinner lens than the 1.67.

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