I'm wondering if I'm able to obtain the FAA 1st class medical certificate with the power of -4.25 and -1 in my eyes. I heard that the difference between the two eyes must not exceed 2 diopters.


1 Answer 1


From the FAA's website

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The key line is "with or without correction". So as long as your vision is correctable to the standards given you are good to go. You can find the full AME guidelines here is you are curious.

  • 1
    $\begingroup$ For those wondering, -1.00 in diopter is roughly equivalent to 20/40. $\endgroup$
    – Mast
    Commented Dec 28, 2017 at 9:25

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