Abstract
Purpose: :
To correlate cataract density by Scheimflug Imaging Densitometry and the influence on operative fluidics and phacoemulsification energy.
Methods: :
This prospective, observational, descriptive study included 20 eyes that underwent phacoemulsification performed by the same Anterior Segment Fellow assisted by a faculty member from March 1, 2011 to June 1, 2011.Before surgery the patients underwent complete ophthalmological evaluation and IOL calculation, including Sheimpflug Imaging by HR Pentacam with special attention to he lens densitometry . After surgery the cumulative dissipated energy value and ultrasound time were obtained.
Results: :
The gender of the patientes were 40% male, 60% female, with mean age of 66.57 years, mean cataract density measured by Sheimpflug was 32.06% (3.30%-76.50% range), mean CDE value was 17.29 (2.30-41.84 range) and ultrasound time was 46.6 sec. (13-101 sec. range). Spearman's rank correlation coefficient test showed a positive correlation between cataract density and CDE value after cataract surgery (r=0.911; p=0.001) and between cataract density and ultrasound time alter cataract surgery (r=0.904; p=0.01).
Conclusions: :
Our study shows a strong positive correlation between cataract density and the amount of energy and ultrasound time used during cataract surgery. This results show that Sheimpflug Lens densitometry may help to predict the phacodynamics that will be used during cataract surgery and allow the surgeon be prepared with extra material or proper precautions.
Keywords: cataract • imaging/image analysis: clinical • training/teaching cataract surgery