I know I've seen this on here somewhere but can't seem to find it. If ordering a pair of straight reading glasses, how do you adapt your presciption from the multifocal (ADD) to just single vision for reading only specs? Say my sphere is +0.50 and my ADD is +2.50, would I just add them together and put +3.00 in the sphere section? I assume the cylinder and axis would remain constant...correct?
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