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  • #79197
    Marcus Espe
    Participant
    Post count: 5

    Hi Jake,

    I’m doing the action items of todays session, which are the following:

    1. Read the 20/50 blog post, for reference about the reason for the 20/30.
    – Check!
    2. Take your current centimeter results, and calculate your estimated diopter correction.
    – Measurements from beginning of sep 2022 to now (03.10.22), using the Varakari Tool
    – L: 37 – 44 cm | -2.27, -2.70
    – R: 36 – 43 cm | -2.33, -2.78
    3. Compare the values to your previous full prescription.
    – My full strength glasses (and prescription) is:
    – R: SPH = -2.25, CYL = -0.50
    – L: SPH = -2.25, CYL = -0.25
    4. Look at the eye chart, in natural lighting, indoors, find out which lines you can read.
    – I can read the 20/15 line and make out the 20/13 line with print pushing / active focus
    5. Your current differential prescription and distance with them.
    – R: SPH = -1.00, CYL = -0.25
    – L: SPH = -1.00
    – Centimeter distance (binocular): 82 cm (it’s intentionally this high due to my at-work monitor)
    —> Post all of that in the forum, and I’ll make suggestions.

    Best regards,
    Marcus

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    • Jake S.
      Keymaster
      Post count: 8756

      Hi Marcus,

      Very nice! Based on the data, what would you chose for diopters?

    • Marcus Espe
      Participant
      Post count: 5

      My own suggestion:
      – R: SPH = -2.00, CYL = -0.50
      – L: SPH = -2.00, CYL = -0.25

      That’s a -0.25 reduction from my full strength glasses, only reducing spherical, which I’m guessing puts me at 20/30 or maybe 20/25, when I look at the eye chart.

      From the cm measurements that would put me just below my calculated diopters, factoring in the 0.5 CYL is the equivalent of 0.25 SPH.

      What do you think Jake?

    • Jake S.
      Keymaster
      Post count: 8756

      I like it.

      You don’t want less than 1 diopter between normalized and differentials. And the differential is a bit on the high side (I understand why, as long as there is a blur horizon it’s fine). I think the first normalized might still be a bit high to get active focus, but then reducing conservatively usually works out best in the long run regardless.

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