ROI Calculator
What SONDA Adds to Your Practice
Example values for an independent optical practice. Adjust them to your own numbers: the paid tests, and what the free lens-fitting test does for progressive sales and refits.
Cumulative Net Position
Year by Year
Year 1 includes the SONDA purchase.
Figures are based on Reyedar’s pricing for optical retail as of 28 September 2026: a one-off purchase including all hardware, installation and training, plus an annual licence for software and servicing. Test prices are what the customer pays out of pocket. This is an illustrative estimate based on the figures you enter, not a quote or a guarantee.
The progressive lens benefit counts extra pairs sold (the uplift you enter, at your gross margin per pair) and refits avoided (your current refit rate, reduced by the share you enter, at the cost of a refit). Staff time is charged for every test run, at the hourly cost you enter.