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Correlation of different methods of Scheimpflug-based densitometry and phacoemulsification parameters in mild grade nuclear cataracts

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Session Details

Session Title: Cataract Surgery Outcomes and Practice Styles

Session Date/Time: Wednesday 09/09/2015 | 08:00-09:30

Paper Time: 09:02

Venue: Room 17

First Author: : F.Faria-Correia PORTUGAL

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

Abstract Details


To evaluate the correlation between different methods of Scheimpflug-based lens densitometry and phacoemulsification parameters in patients with age-related nuclear cataract.


Hospital de Braga, Braga, Portugal


In eyes with age-related nuclear cataract, the Lens Opacities Classification System III (LOCS III) was used to grade the nuclear opalescence (NO). Two different of densitometry methods, specifically the standard three-dimensional (3D) and the region of interest (ROI) modes, were used to evaluate the optical scattering (scale 0 to 100) of the lens nucleus. Phacoemulsification parameters were noted and correlated with the different methods of cataract grading.


A Stop-and-Chop technique was performed in fifty eyes with age-related nuclear cataract. There was a positive linear correlation between the NO score and both densitometry methods (P <.001). The ROI-derived Average Density and Maximum density had a linear correlation with cumulative dissipated energy (r = 0.470 and r = 0.594, respectively), total ultrasound (US) time (r = 0.544 and r = 0.623, respectively), phacoemulsification time (r = 0.473 and r = 0.588, respectively), aspiration time (r = 0.516 and r = 0.541, respectively) and estimated fluid used (r = 0.575 and r = 0.578, respectively), None of the 3D-based densitometric variables had correlation with the parameters of the phacoemulsification.


Lens nuclear densitometry based on the region of interest method correlated with phacoemulsification parameters. Using different densitometry approaches density assessment can predict more efficiently the phacodynamics in cataract surgery.

Financial Interest:

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

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