Four optical tools. Right at hand.
Cross Cylinder, Compound, Near Only and Transpose, together in your optical workflow.
Explore the yearly plan
Choose the tool for the task.
Cross Cylinder, Compound, Near Only and Transpose are shown in the IPDI power calculator.
- Cross Cylinder
- Compound
- Near Only
- Transpose
See the worked result.
The Transpose example changes −1.25 / +3.25 × 60° to +2.00 / −3.25 × 150°. The website offers a working browser demonstration.
Keep the source record in view.
Review the result against the entered prescription values before using it in a customer record. Calculators support the workflow; they do not prescribe.
Which calculator modes are shown in IPDI?
Cross Cylinder, Compound, Near Only and Transpose.
Are all four calculators interactive on this website?
The website offers a working lens-transposition demonstration. The other modes are shown in the app interface preview.
Does the web calculator create a prescription?
No. It demonstrates transposition arithmetic for entered values and does not prescribe, diagnose or confirm clinical suitability.
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