Difference between revisions of Bifocals

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Bifocals are glasses that have two different strengths of lenses depending on where you look through the lens.  Typically bifocals for [[presbyopia]] and [[myopia]] have the lower section (for use during reading) 1-2 [[diopters]] weaker than the upper section.  
Bifocals are glasses that have two different strengths of lenses depending on where you look through the lens.  Typically bifocals for [[presbyopia]] and [[myopia]] have the lower section (for use during reading) 1-2 [[diopters]] weaker than the upper section.  
The EM method uses separate [[differentials]] and [[normalized]] lenses rather than bifocals, making it easier to adjust your [[lens selections]] separately.
The Reduced Lens method uses separate [[differentials]] and [[normalized]] lenses rather than bifocals, making it easier to adjust your [[lens selections]] separately.


=Multifocals=
=Multifocals=

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