ESCRS - MP23 - COMPARISON BETWEEN 80 MICRON FLAP V/S 90 MICRON FLAP FEMTOSECOND LASIK FOR CORRECTION OF MYOPIA AND MYOPIC ASTIGMATISM: A CONTRALATERAL EYE STUDY

COMPARISON BETWEEN 80 MICRON FLAP V/S 90 MICRON FLAP FEMTOSECOND LASIK FOR CORRECTION OF MYOPIA AND MYOPIC ASTIGMATISM: A CONTRALATERAL EYE STUDY

Published 2023 - 27th ESCRS Winter Meeting

Reference: MP23 | Type: Presented Poster & Poster Submission | DOI: 10.82333/8ank-3d23

Authors: Sudarshan Khokhar* 1 , Deeksha Rani 1 , Aishwarya Rathod 1

1Dr. R. P. Centre for Ophthalmic Sciences, AIIMS, New Delhi,New Delhi,India

Purpose

To study and compare the safety, efficacy and outcome of 80 micron flap
versus 90 micron femtosecond flap LASIK.

Setting

 
Dr. R. P. Centre for Ophthalmic Sciences, AIIMS, New Delhi

 

Methods

 
It is a contralateral eye study done in patients undergoing
femtosecond-assisted LASIK between November and December 2021. Inclusion criteria were myopia upto -8.00 diopters (D) and
astigmatism up to -3.00 D and no previous surgeries. For uncorrected distance
visual acuity (UDVA), manifest refraction, corrected distance visual acuity
(CDVA), intraocular pressure (IOP), slit lamp and dilated fundus examination,
pentacam and iTrace was done preoperatively and on day 1, 1 week and 3 weeks. The Zeiss Visumax was used for flap construction and the
Zeiss MEL 90 excimer for refractive treatment. Flap thickness was measured at
week 1 with anterior segment optical coherence tomography (AS-OCT).

Results

 
48 eyes of 24 patients were included in the study. Mean decimal
uncorrected visual acuity was comparable between both the groups
preoperatively(P=0.868), 1week (P=1.00) and 3 week(P=1.000). there was no
loss of CDVA lines. Mean preoperative pachymetry was 499.8 micron and was
comparable between 2 groups (P=0.336). higher order aberration between the 2
groups were comparable preoperatively(P=0.4068), at post op week
1(P=0.4395) and post op week 3(P=0.4458). there was no incidence of suction
loss. Opaque bubble layer was noted in 2 eyes In each group.

 

 

Conclusion

 
The use of ultrathin flaps using Zeiss Visumax was safe, reliable
and reproducible. Both 80 micron and 90-micron flap showed excellent
postoperative day 1 visual acuity and can be safely used to maintain a safe
percentage of tissue altered.