Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Prescription axis: 4 deg. vs. 175 deg.

  • 20-04-2008 3:31pm
    #1
    Registered Users, Registered Users 2 Posts: 189 ✭✭


    Hi,

    Anyone understand the geometry of the axis component of your eyetest?

    It relates to astigmatism, and it goes from 0 to 180 degrees.

    My prescription changed recently from 4 degrees (it was 3 degrees in the test before that) to 175 degrees.

    This is a 9 degree change, so is that significant, or 'sample error'?

    I would not have imagined that the axis would change over time, unlike the strength of the subscription which changes as you get older.


Comments

  • Registered Users, Registered Users 2 Posts: 991 ✭✭✭endplate


    The axis change is very small it's probably more to do with the type of equipment used to determine your prescription. It's nothing to worry about


Advertisement