Evaluation Of Visual And Refractive Outcomes Of 1500 Eyes Of Keratorefractive Lenticule Extraction Performed On Visumax 800
Published 2025 - 43rd Congress of the ESCRS
Reference: PP12.06 | Type: Free paper | DOI: 10.82333/vx21-fh36
Authors: Maria Camila Del Castillo* 1 , Mariana Lopez 1 , Naomi c Zatarain 2 , David Jimenez 2 , Mariana Navarrete 2 , Daniela Pulido 1 , Enrique Graue 2
1Anterior Segment,Conde de Valenciana,Mexico,Mexico, 2Cornea,Conde de Valenciana,Mexico,Mexico
Purpose
Evaluate the early visual and refractive outcomes of eyes undergoing keratorefractive
lenticule extraction with the new VISUMAX 800 femtosecond laser for myopia and myopic
astigmatism.
Setting
The study is performed at a private practice setting at Chennai , Tamilnadu , India.
Institutional review board approval was obtained for this study
Methods
This was an retrospective, single site study evaluating consecutive eyes that underwent routine
SMILE with VISUMAX 800 for myopic astigmatism. Data was collected from patients that were
treated with SMILE between June 2022 and July 2023. VM800 data was collected according to the Declaration of
Helsinki
Patients
The inclusion criteria were subjects found suitable for routine SMILE, at least 18 years of age, myopia
up to -10 D, cylinder up to 5 D, pre op CDVA of 20/25 or better, and a minimum CCT of 480 μm.
Patients were reviewed on POD 1 , 30 and 90. The 3 month post op data is represented in this study
Pre and post op aberrations as recorded on an aberrometer were also recorded
Results
Results: Normality of the data was checked using Shapiro-Wilk’s test. Comparison of treatment outcomes
between groups was performed using unpaired Student’s ‘t’ test for data that followed normal
distribution
Data was collected from 1500 eyes that underwent routine lenticule extraction. The mean
attempted spherical equivalent was -4.11±1.94 D At the 3-month postoperative visit, UDVA was
20/20 or better in 94% of eyes compared to 100% with a preoperative CDVA of 20/20 or better.
Accuracy of the SEQ showed that 92.5% of eyes were within ±0.50 D and 98.7% were within ±1.00 D
of intended target. Cylinder analysis showed that 91.9% of eyes had ≤ 0.50 D of refractive
astigmatism. No eyes lost two or more lines of CDVA.
Conclusions
KLEX on Visumax 800 is a safe and effective procedure for the treatment of myopia and astigmatism. The intraoperative cyclotorsion compensation offered by the VM 800 platform allows for accurate correction of astigmatism. The centration aids which help align the treatment zone on the corneal vertex assist in accurate treatment centration/ This is evidenced by the low amount of higher order aberration change at the 3 month visit in comparison to the pre op visit.
To conclude , KLEX on Visumax 800 has proven to be a safe and effective modality in the correction of myopia and myopic astigmatism