Comparison of safety,efficacy and post operative endothelial cell density following standard phacoemulsification versus LENSAR femtosecond laser assisted cataract surgery in dense cataract.

FLACS(Femtosecond assisted cataract surgery) is the deviced to give most precise, accurate results following cataract surgery. Several studies have been performed to check for safety and efficacy of FLACS vs standard phacoemulsification in harder cataract. LENSAR FS laser system has been introduced, whichincorporates Augmented Reality through advanced Scheimpflug imaging, raytracing and 3D confocal structured illumination (3D-CSI) to construct athree-dimensional model of the anterior segment of the eye including the corneaand lens.Turretssoftware available in LENSAR FS system enables use of chop and fragmentationpatterns. It is an extended fragmentation region near the center of theanterior capsule governed by two parameters: Max Turret Radius ( radial extentof the turret) and Extend Turret ( extent of the turret above the capsule; mustbe negative to avoid affecting the capsulotomy button). The softwareconsolidates 16 individual high resolution Scheimpflug images from 8 angularpositions to identify the major interfaces ie anterior and posterior cornealsurface and anterior and posterior lens capsule, details of the location anddensity of the lens nucleus and the boundaries between endonucleus, epinucleusand cortex , thus allowing automated grading of cataract density andcustomization of phacofragmentation and reducing cumulative dissipated energy(CDE) minimising potential for inflammation and endothelial cell loss.This prospective, non-randomized study will thusbe conducted  to investigate the intra-operativecumulative dissipated energy (CDE) and endothelial cell density (ECD) in densecataracts following  standardphacoemulsification surgery versus FLACS with LENSAR FS laser system over along term follow-up of 12 months.