Difference between revisions of Guide:Reducing lens complexity
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There are three types of reductions with respect to the power change: | There are three types of reductions with respect to the power change: | ||
* a 0.25 [[diopter]] drop to [[spherical]] power | * a 0.25 [[diopter|D]] drop to [[spherical]] power | ||
* a 0.25 D drop to [[cylindrical]] power | * a 0.25 D drop to [[cylindrical]] power | ||
* a trade of 0.5 D cylindrical power for 0.25 spherical power | * a trade of 0.5 D cylindrical power for 0.25 D spherical power | ||
'''There are four rules for reducing complexity:''' | '''There are four rules for reducing complexity:''' | ||