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Trusting the experience of 100 million IOL power calculations.
ZEISS IOLMaster 500
ZEISS IOLMaster 500
The gold standard in optical biometry

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

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

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

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
Downloads
Articles and clinical cases

Meta-Analysis Toric IOL Power Calculation
The IOLMaster and Determining Toric IOL Power
6 Page(s)
DICOM Conformance Statements

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