Difference between revisions of Correction
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BO is Base out, BI is Base in, BU is Base up and BD is Base down. | BO is Base out, BI is Base in, BU is Base up and BD is Base down. | ||
[[Pupillary Distance]] or PD, is the final set of numbers you need to be aware of. Most likely this is not listed on your "prescription" you will need to ask for it or measure it yourself. | [[Pupillary Distance]] or PD, is the final set of numbers you need to be aware of. Most likely this is not listed on your "prescription" you will need to ask for it or measure it yourself. Some optometrists will charge you e.g. $30 to tell you your PD, but many others will tell you for free. | ||
==Rounding== | ==Rounding== | ||