Official ESCRS | European Society of Cataract & Refractive Surgeons

Model eye measurement with novel device combining Purkinje reflections and OLCR

Session Details

Session Title: Cataract 1
Session Date/Time: Friday 20/02/2015 | 10:30-12:30
Paper Time: 10:36
Venue: Sadirvan B
First Author: : M.Mrochen SWITZERLAND
Co Author(s): :    A. Noland   D. Boss   P. Zakharov   D. Bogusevschi   M. Galligan   M. Talary

Abstract Details


A novel ocular biometer that consist of a Purkinje imaging method and a optical coherence device has been developed for this purpose. We hypothesise that the new ocular beometer can produce highly accurate and reproducible measurements of physical model eyes parameter.


ClearSight Innovations Ltd, Dublin, Ireland IROC Science, Zurich, Switzerland


The device was used to measure 5 model eyes (C01 – C05) with parameters representative of the typical pre-operative cataract eye. The mean radius of anterior cornea, posterior cornea, anterior lens and posterior lens, central corneal thickness, anterior chamber depth, lens thickness and axial length were measured 5 time for each model eye. Before, these parameters had been verified by means of independent measurement techniques. The difference, Δ, between these two measurement techniques for all model eyes are analyzed. The variability for each parameter was assessed across multiple measurements of each model eye.


All parameter could be reconstructed and measured by the new ocular biometer. The differences between the parameter are below clinical relevant values. The variability across 5 measurements of each of the 5 model eyes are with the average deviation from the independent measurements.


Our results show /demonstrate that the new ocular biometer is capable of measuring model eyes with parameters representative of pre-op human eyes with high accuracy and repeatability. Clincal investigations are ongoing to evaluate the reproduceability of the device in human eyes.

Financial Disclosure:

One or more of the authors has significant investment interest in a company producing, developing or supplying product or procedure presented, One or more of the authors travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented, One or more of the authors receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented

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