Hello Optiboard!!, I need help with vertical Imbalance questions!
The first question is " A patient's Rx is OD: -2.00 +1.00 x 090 and OS: -1.00 +3.00 x180 Add +2.00. At a reading level of 10mm, for a slab off, which lens should be used and how much imbalance is there?
What confuses me is that each eye has a different refractive power(opposite sign) at 90 degrees and the book is telling me that the difference is 4 diopter?
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