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Thread: Just depend on the isocylinder chart how we know that it is hard or soft design????

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    Just depend on the isocylinder chart how we know that it is hard or soft design????

    how we analysis just from the isocylinder chart can try to know the design is soft or hard design?????

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    Master OptiBoarder Darryl Meister's Avatar
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    Generally, narrowly spaced cylinder contours indicate that the design is "harder" through that region of the lens, while widely spaced cylinder contours indicate that the design is "softer."
    Darryl J. Meister, ABOM

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    Bad address email on file QDO1's Avatar
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    It is wrong to define lenses as hard or soft, a lens can have both hard and soft atributes on the same lens. Technology has advanced so much, that the old hard/soft definitions are defunct. Perhaps we should work on a new analogy to describe lens surfaces

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    Master OptiBoarder Darryl Meister's Avatar
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    Quote Originally Posted by QDO
    It is wrong to define lenses as hard or soft, a lens can have both hard and soft atributes on the same lens.
    Yes, a lens may have, for instance, a softer distance periphery with a harder near periphery.
    Darryl J. Meister, ABOM

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    Bad address email on file QDO1's Avatar
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    Quote Originally Posted by cnet_baby
    how we analysis just from the isocylinder chart can try to know the design is soft or hard design?????
    may i ask you how you alter your dispensing decisions if a lens is hard or soft?

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    can't really understand what u trying to ask???

    Quote Originally Posted by QDO1
    may i ask you how you alter your dispensing decisions if a lens is hard or soft?
    i can't really to understand what u trying to ask me

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    Bad address email on file QDO1's Avatar
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    Quote Originally Posted by cnet_baby
    i can't really to understand what u trying to ask me
    well you asked: can i use an iso-cylinder chart to tell if the lens is a hard or a soft design, and I asked - if the lens is a soft design - when would you use that soft design lens, and if the chart indicated a hard design - how or who would you dispense that too

    or

    the iso cylinder charts indicate the following:

    Hard design
    Lens a - hardest
    lens B - quite hard
    lens c - just hard

    Soft design
    lens x - just soft
    lens y - quite soft
    lens z - softest

    on the basis of these results, which design would you dispense to whom, and why?

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    Master OptiBoarder Darryl Meister's Avatar
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    Often, emerging presbyopes and visually active wearers (requiring good dynamic vision) prefer slightly "softer" designers, while current bifocal users and sedentary wearers (especially those requiring wider fields of distance and/or near vision, such as an office worker) might prefer slightly "harder" designs.
    Darryl J. Meister, ABOM

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