Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Objective evaluation of nuclear cataracts: comparison of dysfunctional lens index and Scheimpflug lens densitometry

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Session Details

Session Title: Presented Poster Session: Training and Innovation in Education/Quality of Vision Evaluation

Session Date/Time: Monday 12/09/2016 | 09:30-11:00

Paper Time: 09:30

Venue: Poster Village: Pod 3

First Author: : F.Faria Correia PORTUGAL

Co Author(s): :    I. Ramos   B. Lopes   N. Franqueira   T. Monteiro   R. Ambrosio Jr  

Abstract Details


To describe the Dysfunctional Lens Index (DLI) from ray-tracing aberrometry and to test its correlations of with logarithmic minimal angle resolution (logMAR) best-corrected visual acuity (CDVA) and lens grading based on the Lens Opacities Classification System (LOCS) III and the Scheimpflug-based lens density.


Hospital de Braga


The DLI is calculated using data from the ray-tracing of 256 single laser beams projected to the eye, by the i-Trace Visual Function Analyzer (Tracey Technologies, Houston, Texas, USA). A scale from 0 to 10 points is presented. Forty eyes of 30 patients with mild to moderate age-related nuclear cataract were included retrospectively. Along with the DLI, nuclear opalescence (NO) grading was obtained by slit lamp using the LOCS III, and objective lens densitometry was evaluated by Scheimpflug imaging (Pentacam HR, Oculus, Wetzlar, Germany). The average density parameter from Scheimpflug (0 to 100 points) of the nucleus lens was considered.


The mean average density of the lens nucleus was 8.21 ± 0.80 (range 7.1 to 11.0). The mean DLI was 7.54 ± 2.56 (range 2.01 to 10.00). The DLI had a high negative linear correlation with the LOCS III NO score (r = -0.662, P < .01). The average density of the lens nucleus was positively correlated with the LOCS III NO score (r = 0.682; P < .01). The CDVA had a stronger relationship with the DLI parameter (r = -0.702, P < .01) compared to the with the average density values (r = 0.630, P < .01).


The DLI was correlated with the LOCS III NO score and the Scheimpflug-based lens density. Regarding the visual performance, the DLI had a stronger correlation with CDVA compared to the LOCS III classification or the Scheimpflug-based lens density. The DLI may improve the preoperative evaluation of nuclear cataract and monitoring its progression.

Financial Disclosure:

One or more of the authors receives non-monetary benefits from a company producing, developing or supplying the product or procedure presented.

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