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ABO-NCLE study terms 2023
ABO-NCLE study terms 
 
Transposition - location of power of lens on any meridian 
 
flat transposition - - the formula used to switch between two different ways of writing a prescription 
- A prescription written in minus cylinder form (-1.00 - 1.00 X 90) is the same as a prescription written in plus cylinder form (-2.00 +1.00 X 180). Minus cylinder form is the more common way of writing prescriptions and **most optical formulas will require the prescription to be in minus cylinder form before ...