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    tableclocks's Avatar
    tableclocks Posts: 383, Reputation: 2
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    #1

    Jan 19, 2009, 03:50 PM
    New prescription
    Is it possiable my script to change this much over 2 years
    Old one
    Sph cly axis
    Od +100 -100 110

    Os -100 -50 75

    New one
    Od +75 +100 25

    Os +75 +75 170

    Looks like big changes to me... I didn't have the old script fot the dr to look at he started from Q 1
    Thanks for your input and help... richard
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Jan 19, 2009, 05:10 PM

    Are you sure the first script reads OS -100?

    Your vision got worse by about a 25% change in focal length.

    From 0.393" to 0.524"

    I don't buy the -100 to +75 change.

    The other numbers are for Astigmatism corrections. OD is right eye and OS is for the left eye.

    The script is written in Diopters and 1/D = focal length in meters. So, convert 1/75 and 1/100 meters to inches.
    A minus is nearsighted and a plus is farsighted.
    Fr_Chuck's Avatar
    Fr_Chuck Posts: 81,272, Reputation: 7690
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    #3

    Jan 19, 2009, 06:45 PM

    Yes, your vision can change large amounts over 2 years, in fact that is why they want you to have it checked at least once a year.
    tableclocks's Avatar
    tableclocks Posts: 383, Reputation: 2
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    #4

    Jan 20, 2009, 04:04 AM
    Quote Originally Posted by KeepItSimpleStupid View Post
    Are you sure the first script reads OS -100?

    Your vision got worse by about a 25% change in focal length.

    From 0.393" to 0.524"

    I don't buy the -100 to +75 change.

    The other numbers are for Astigmatism corrections. OD is right eye and OS is for the left eye.

    The script is written in Diopters and 1/D = focal length in meters. So, convert 1/75 and 1/100 meters to inches.
    A minus is nearsighted and a plus is farsighted.
    Ty... yes I read the scripts correct... this kind of change is possiable? Tks... richard
    ChihuahuaMomma's Avatar
    ChihuahuaMomma Posts: 7,378, Reputation: 608
    Vision Expert
     
    #5

    Jan 21, 2009, 11:37 AM

    That prescription needs to be transposed. And once it is, your vision hasn't changed too much.

    If your sphere is a plus and your astigmatism is as well, then its written to be transposed. So, your vision hasn't changed more than a quarter diopter, and that's not bad AT ALL. That's a minimal change.
    tableclocks's Avatar
    tableclocks Posts: 383, Reputation: 2
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    #6

    Jan 21, 2009, 01:42 PM
    Quote Originally Posted by ChihuahuaMomma View Post
    That prescription needs to be transposed. And once it is, your vision hasn't changed too much.

    If your sphere is a plus and your astigmatism is as well, then its written to be transposed. So, your vision hasn't changed more than a quarter diopter, and that's not bad AT ALL. That's a minimal change.
    Thank you very much for your answer... I was worried about the flip flop that the axis and the cly did... so its OK?. please reply again... thank you very much... richard
    ChihuahuaMomma's Avatar
    ChihuahuaMomma Posts: 7,378, Reputation: 608
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    #7

    Feb 10, 2009, 01:11 PM

    Things are okay.
    tableclocks's Avatar
    tableclocks Posts: 383, Reputation: 2
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    #8

    Feb 11, 2009, 10:29 AM
    Quote Originally Posted by ChihuahuaMomma View Post
    Things are okay.
    Please see private message... maybe I have to make a choise between better vision up to 15... 20 ft or distance at a few hunded feet to yards?

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