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Zeiss IOLMaster®
Online Users Instruction Manual V.4

printable version

IOL Power Calculations

Optical Biometry

Lens Constants

Validation Guidelines

Haag Streit LENSTAR®

Zeiss IOLMaster®

IOLMaster VIDEO Tutorial

IOLMaster Manual V.5

IOLMaster Manual V.4

Anterior Chamber Depth

IOLMaster Checklist (pdf)

IOLMaster Manual V.4 (pdf)

IOLMaster Manual V.3 (pdf)

Special Thanks

Zeiss IOLMaster Customer Service: 1-877-486-7473 ext. 4030

IOLMaster — Anterior Chamber Depth
Phakic Eyes.

Missing Lens Image with Phakic Eyes

Particularly in the case of eyes with small pupils it may happen that no light is reflected back into the viewing optics of the IOLMaster. A slight lateral misalignment may make the lens invisible. This problem may also appear with restless or poorly fixating patients.

Phakic Eye

In such a case, the slit image on the iris is (almost) continuously visible. The automatic evaluation software does not recognize this kind of maladjustment. The system will display values that are too short.

These values do not correspond to the actual anterior chamber depth, but represent the distance between the anterior cornea and the iris. Make sure that the lens section is placed on the front section of the crystalline lens.

Adjust the IOLMaster laterally until the anterior lens becomes visible. If necessary, ask the patient to look steadily at the fixation light. Then, repeat the measurement.

Note: It will suffice if a relatively small section of the lens is visible. The picture below shows an alignment that permits accurate measurement.

Phakic Eye

The image is sufficient for the calculation of the anterior chamber depth. (In the photo above, the front side of the IOL Master is visible as a non-disturbing artifact).

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Zeiss IOLMaster® Tutorial Version 4

Zeiss IOLMaster®

Optical Biometry

Intraocular Lens Power Calculations

East Valley Ophthalmology
5620 East Broadway Road
Mesa, Arizona 85206

Tel: +1-480-981-6111
FAX: +1-480-985-2426

Arizona's Top Eye Doctors - East Valley Ophthalmology provides this online information for educational and communication purposes only and it should not be construed as personal medical advice. Information published on this website is not intended to replace, supplant, or augment a consultation with an eye care professional regarding the viewer/user's own medical care. East Valley Ophthalmology's disclaims any and all liability for injury or other damages that could result from use of the information obtained from this site. Please read our full Terms, Privacy, Infringement

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IOLMaster — Anterior Chamber Depth Phakic Eyes.

Eye Doctors for Mesa, Gilbert, Chandler, AZ and surrounding areas.

IOLMaster — Anterior Chamber Depth
Phakic Eyes.