IOLMaster Online

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Fast, easy, reliable

The step by step process gives you immediate post-operative refraction data for the calculation of ZEISS toric IOLs.

Refractive outcomes

With Z CALCTM you have the benefit of the time proven, optimized calculation algorithm performance from Carl Zeiss.

Customized results

The toric IOL sphere and cylinder powers can be modified according to the residual refraction desired. This provides excellent refractive outcomes for satisfied, happy patients.

Secure online access

After your registration has been processed, you can securely access Z CALCTM anytime from anywhere.

Summary of results

For peace of mind, before sending your order request, you can review the results, patient data and a visualization of the recommended alignment.

Z CALC toric IOL calculator
Detailed instructions and help available in Z CALCTM


IOLs and related products are currently not
for sale in the United States.