The prescription lives with the sale
SPH, CYL, AXIS, ADD and PD are saved together with the sale. When a prescription changes, the old one isn't overwritten; a new version is added. When a customer calls asking for their numbers, there's no separate notebook to dig through.
| SPH | CYL | AXIS | ADD | |
|---|---|---|---|---|
| Right | −1.25 | −0.50 | 180 | +2.00 |
| Left | −1.00 | −0.75 | 170 | +2.00 |
PD 63 mm