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hi, you have three ways to do it:
First Ask for the lab to surface the prism
second you can dot up with the lensometer just putting the center in the second circle depnds if it is BO or BI and R...

Yes, but it depens the orinetation of your prism, you have to set against the base and it has to be in the center

hi, you have three ways to do it:
First Ask for the lab to surface the prism
second you can dot up with the lensometer just putting the center in the second circle depnds if it is BO or BI and R...

Hi, Its very simple is the first thing you have to say.
well first you have to find find the two lines starting by the high positive power ,that will be the spherical power. Example. +3.50 Then...