Flap Thickness And Visual Outcomes Comparison Between Elita And Ifs
Published 2024 - 42nd Congress of the ESCRS
Reference: FP12.06 | Type: Free paper | DOI: 10.82333/hhnh-gr61
Authors: Pooja Khamar* 1 , Mahipal Sachdev 2 , Rohit Shetty 1 , Wee Jin Heng 3 , Raghav Malik 2 , Ritika Sachdev 2 , Michal Laron 3 , Andrew Voorhees 3 , Hong Fu 3 , Ying Wang 3 , Alejandra Gonzalez Calle 3 , Brian Schwam 3
1Narayana Nethralaya,Bengaluru,India, 2Centre For Sight,New Delhi,India, 3Johnson and Johnson,Milpitas,United States
Purpose
Johnson & Johnson Surgical Vision has developed a new femtosecond laser (ELITA). In this clinical trial the flap thickness accuracy for Laser In-situ Keratomileusis (LASIK) was evaluated with ELITA compared to iFS in terms of intended versus achieved thickness and visual outcomes up to 3-month post-operatively.
Setting
A prospective, randomized, interventional clinical trial was conducted in three clinical sites where 181 subjects participated.
Methods
181 Subjects received LASIK surgery using the ELITA laser in 1 eye and iFS in the fellow eye for flap creation. Flap thickness was targeted at 110 µm and calculated as the average of three measurements from three AS-OCT scans. Uncorrected visual acuity (UCVA), manifest refraction spherical equivalent (MRSE), and best spectacle-corrected visual acuity (BSCVA) were obtained at 1 and 3 month postoperatively.
Results
Results from 181 patients were available at 1 day post op, 176 at 1 month post op and 178 at 3 month post op. Flap thickness was targeted at 110 µm. The Mean flap thickness at 3-mo for ELITA was 109.2(SD ±5.97µm) and for iFS 109.5(SD ±5.74 µm) achieving an accurate flap thickness with both ELITA and iFS. Mean MRSE was -3.84±2.32D (ELITA) and -3.81±2.23D (iFS) pre op. UCVA was 20/20 or better in 80% of ELITA eyes and 77% of iFS eyes 1 day post op and 98% of ELITA eyes and 97% of iFS eyes 3 month post op. BSCVA was 20/20 or better in 100% of ELITA eyes and iFS eyes 1 month post op and on.
Conclusions
The new femtosecond laser ELITA demonstrates accurate flap thickness, similar to iFS with comparable variability, and excellent visual outcomes when creating flaps for LASIK.