Correlation of Slitlamp-Based Cataract Grading, Femtosecond Laser Imaging System-Based Cataract Grading, and Cumulative Dissipated Energy in Eyes Having Laser-Assisted Cataract Surgery
Narrative Responses:
Purpose
To compare the correlation between slit lamp-based cataract grading, femtosecond laser imaging system-based cataract grading and utilized ultrasonic energy, among patients undergoing laser assisted cataract surgery (LACS).
Methods
Fifty-two eyes scheduled to undergo LACS underwent preoperative nuclear opacity grading using the LOCS III system and surgeon grading based on images derived from a high-resolution Scheimpflug-based imaging (HRSI) system installed on a femtosecond cataract laser system. These eyes then underwent laser anterior capsulotomy and laser lens fragmentation. The preoperative grading scores were correlated with cumulative dissipated energy (CDE) utilized during subsequent phacoemulsification.
Results
There was a significant positive correlation between LOCS III grading and HRSI grading with the correlation coefficient being 0.78 (P<0.05). There was significant positive correlation between LOCS III grading and utilized CDE with the correlation coefficient being 0.665 (P < 0.05). There was a significant, slightly higher, correlation between HRSI nuclear grading and utilized CDE with correlation coefficient being 0.692 (P < 0.05).
Conclusion
HRSI system-based cataract grading is comparable to LOCS III clinical grading and can be used to predict the amount of ultrasonic energy utilized during LACS.