Quick Answer
PD is NOT the SPH (sphere) number. PD is labeled "PD", "Pupillary Distance", or shown as two numbers (e.g., 31/32).
Where to Look
- Bottom of prescription, separate from SPH/CYL/AXIS
- May appear as single number (e.g., 62) or dual (e.g., 31/32)
- Sometimes written as Dist PD and Near PD
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