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Changes in lenses to Higehr Index

  • 28-07-2008 11:08am
    #1
    parsi
    Site Banned Posts: 5,904 ✭✭✭


    I've just got new glasses and the lenses are now 1.74 Index. My previous pair were something around 1.64 . I'm myopic and use a strong prescription.

    I'm finding that objects near to me are appearing slimmer but not shorter eg a bottle would seem to be slim but the same height as usual.

    My prescription has changed slightly but I got a pair of sunglasses as well with lower index lenses and they don't seem to be causing the same problem.

    I'm used to the fact that getting new specs leads to a period of adjustment but this is the first time i've seen this effect.


Comments

  • #2
    Moonbeam
    Moderators, Education Moderators, Society & Culture Moderators Posts: 18,986 Mod ✭✭✭✭Moonbeam


    I can't say that I have noticed this at all.
    I have a semi strong prescription and 1.74 high index lenses too.
    Maybe they messed the prescription up a bit?


  • #3
    Daisies
    Moderators, Science, Health & Environment Moderators Posts: 4,644 Mod ✭✭✭✭Daisies


    Myopic prescriptions in general make objects look smaller. Thicker lenses more so. As a result as the same prescription will be thinner in a 1.74 index lens as opposed to a 1.6 or 1.67 les they will not appear as small


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