Trusting the experience of 100 million IOL power calculations.

ZEISS IOLMaster 500

ZEISS IOLMaster 500

The gold standard in optical biometry

ZEISS IOLMaster 500 optical biometer

The IOLMaster® 500 from ZEISS is the gold standard in optical biometry, with more than 100 million successful IOL power calculations to date. The ZEISS IOLMaster 500 is a great choice for cataract surgeons looking for a reliable, fast and easy-to-use optical biometer for measurements they can depend on.

Refractive outcomes you can trust

The ZEISS IOLMaster is the only optical biometer to feature distance-independent telecentric keratometry.

It enables robust and repeatable measurements and shows excellent agreement with manual keratometry while achieving higher precision.1 In combination with a wide variety of established formulas, you can achieve refractive outcomes you can trust.2

Fast and easy to use

ZEISS IOLMaster 500 Fast and easy to use
ZEISS IOLMaster 500: Fast and easy to use

A well-designed user interface, plausibility checks, distance-independent measurements and a reading that’s up to 4 times faster compared to other optical devices provide outstanding usability and reduced chair time.3 You can measure both eyes in less than 60 seconds4. A difference you, your team and your patients will notice every day.

Advanced measurement of challenging eyes

ZEISS IOLMaster 500 measures challenging eyes
ZEISS IOLMaster 500 measures challenging eyes

In denser cataracts the ZEISS IOLMaster 500 achieves a measurement success ratio that is up to 20% higher than that of other optical biometers5, allowing a cataract penetration rate of more than 93%6. Even with staphyloma, pseudophakic and silicone-filled eyes, the ZEISS IOLMaster 500 measures along the visual axis. And with its Haigis-L formula, the ZEISS IOLMaster 500 allows IOL calculation for myopic and hyperopic post-LVC cases.

Precise and efficient markerless toric IOL alignment7, 8

ZEISS IOLMaster 500- Implant toric IOLs markerless
ZEISS IOLMaster 500 - Implant toric IOLs markerless

The ZEISS IOLMaster 500 is an integral part of the ZEISS Cataract Suite. A reference image is acquired and used for intraoperative matching with the live eye image during cataract surgery. Both reference images and keratometry data are transferred to ZEISS CALLISTO eye® computer – assisted surgery system. Manual marking steps can be skipped altogether for efficient8 and more precise7 toric IOL alignment with reduced residual astigmatism.9



Brochure: ZEISS IOLMaster 500

Defining biometry

12 Page(s)
File size: 525 kB


Articles and clinical cases

Meta-Analysis Toric IOL Power Calculation

The IOLMaster and Determining Toric IOL Power

6 Page(s)


DICOM Conformance Statements

DICOM Conformance Statements

Access DICOM 3.0 Conformance Statements for products from Carl Zeiss Meditec.

Services in focus


The ultimate in service

Do you rely on high system availability? If your answer is yes, then consider ZEISS OPTIME service agreements, which are designed to ensure the readiness of your medical equipment at all times.

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