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  Zeiss IOLMaster®
Online Users Instruction Manual V.4
printable version
IOL Power Calculations IOL Power Calculations
Optical Biometry Optical Biometry
Lens Constants Lens Constants
Validation Guidelines
Haag Streit LENSTAR® Haag Streit LENSTAR
Zeiss IOLMaster® Zeiss IOLMaster
IOLMaster VIDEO Tutorial
IOLMaster Manual V.5 Cataract Surgery Arizona
IOLMaster Manual V.4 IOLMaster User Manual V.4
Axial Length (ALM)
Best Technique
Summary of Results
Interpretation of Signals
Signal Curves
Pseudophakic Eyes
Clear Media
Mild Cataract
Moderate Cataract
Dense Cataract
Zooming Display
Post-run Editing
IOL Master Manual Download IOLMaster Checklist (pdf)
IOL Master Manual Download IOLMaster Manual V.4 (pdf)
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Special Thanks

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

IOLMaster — Axial Length Measurement
Pseudophakic Eyes.

Pseudophakic Eyes and False Images

IOL Master Pseudophakic false images

Measuring Errors with Pseudophakic Eyes

Two peaks may appear when measuring pseudophakic eyes and with certain intraocular lenses (e.g. Acysof). The first peak (false) is from the IOL, while the second peak is produced by the retina. In this case, manual correction of the axis length is necessary. It is expedient to measure at a number of different points.

Because the IOL Master is an optical device, reflections off the surface of PMMA, acrylic intraocular, and occasionally silicone lenses, can sometimes produce false images. To avoid this, sample several areas around the reticule using the correct Measurement Technique.

If there is a visible reflection off the surface of an intraocular lens implant, excluding the responsible area will usually give correct results. When the axial length is much shorter than expected, a false image is probably in play. Then, a comparison with the fellow eye typically renders a significant difference, usually greater than 3.00 mm.







IOLMaster Help

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

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