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Objective assessment of nuclear cataracts: comparison of double-pass and Pentacam Scheimpflug systems

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Session Details

Session Title: Cat Surgery Equipment/inst/OVD

Session Date/Time: Tuesday 16/09/2014 | 16:30-18:00

Paper Time: 16:30

Venue: Boulevard B

First Author: : S.Chung SOUTH KOREA

Co Author(s): :    K. Hwang   Y. Lee   S. Lim        

Abstract Details


To compare the objective assessment of lens density by 2 systems (Optical Quality Analysis System double-pass and Pentacam Scheimpflug) in eyes with age-related nuclear cataract.


Department of Ophthalmology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, South Korea


In eyes with age-related nuclear cataract, the objective lens density (0 to 100 points) was determined using the Scheimpflug system while subjective grading was achieved using the Lens Opacities Classification System III (LOCS III). The objective scatter index (OSI) (0 to 25) was assessed using the double-pass system.


This study enrolled 47 patients (70 eyes). The mean OSI was 4.08 ± 2.22 (SD), and the mean Scheimpflug-measured lens density was 16.44 ± 4.36; the 2 parameters were correlated (r =0.764, P < .01). There was a positive linear correlation between the OSI and LOCS III grading scores for nuclear opalescence and nuclear color (r = 0.772 and r = 0.752, respectively; P < .01). The cumulated dissipated energy (CDE) was strongly correlated with the OSI (r = 0.768) and Scheimpflug-measured lens density (r = 0.753).


The OSI based on the double-pass system was correlated with the Scheimpflug-measured lens density, subjective lens grading, and CDE. The OSI may improve the preoperative evaluation of nuclear cataract and help predict phacodynamics in cataract surgery.

Financial Interest:


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