Safety, Efficacy, And Predictability Of The Lensar Femtosecond Laser Enabled Arcuate Incisions For The Correction Of Preoperative Astigmatism During Cataract Surgery

To evaluate the safety, efficacy, and predictability of  the arcuate incisions created by LENSAR FS Laser for management of preoperative astigmatism at the time of cataract surgery

Nethradhama Superspeciality Eye Hospital , Bangalore ,India

This prospective study included 30 eyes from 30 patients who underwent femtolaser assisted cataract surgery with the LENSAR Femtolaser System(LENSAR), and received anterior penetrating arcuate incisions to treat  corneal astigmatism up to 2.00 D. The LENSAR Femtolaser System imports the Pentacam topography (obtained in the supine position) and calculates the required axis and arc length of the arcuate incision using an in-built nomogram. Furthermore, image acquisition is coupled with the LENSAR FS laser to allow for iris registration, on which astigmatism correction is based during cataract surgery. All incisions were opened using a Sinskey’s hook at the end of the procedure. Follow-ups were conducted at 1week, 1month and 3months post-op.

The mean age of  the study participants was  66.13±9.73 years and the mean pre-operative keratometric astigmatism (Pentacam) was 0.87±0.30 D ( 0.4 to 1.7 D). Average degree of intra-operative cyclorotation noted was 5±1.8 degrees. At 3 months post-op, corneal astigmatism reduced  significantly to a mean value of 0.18±0.12 D, p-value=0.02. Ninety-five % eyes were within ±0.5 D of refractive astigmatism. The incisions were well tolerated by all patients and no eye developed complications such as persistent epithelial defects or infection in the post-op period. 

The arcuate incisions achieved by LENSAR FS Laser system were safe, effective and demonstrated good predictability for astigmatism correction using femtolaser technology. 

 

Financial Disclosure: Dr Sri Ganesh and Dr Sheetal Brar are consultants for Carl Zeiss Meditec