Posters

Effect of lower laser energy levels on the clinical outcome after Small-Incision Lenticule Extraction (SMILE)

Poster Details

First Author: E.Boiko RUSSIA

Co Author(s):    A. Titov   D. Mirsaitova   .               

Abstract Details

Purpose:

To determine the influence of laser energy lowering on clinical outcomes in small-incision lenticule extraction (SMILE).

Setting:

1S. Fyodorov Eye Microsurgery Federal State Institution, Saint Petersburg branch 2North-Western State Medical University named after I.I. Mechnikov, Saint Petersburg 3S.M. Kirov Military Medical Academy, Saint Petersburg

Methods:

This study included 60 patients (37 women and 23 men, 120 eyes) with moderate myopia, in some cases with myopic astigmatism (with a mean SE of -4.53±0.86). 15 patients (30 eyes) of each group underwent SMILE surgery with different laser energy levels. In groups 1 to 4, energy indeces 32, 30, 29 and 28 were used (Pulse energy 160, 150, 145 and 140 nJ, respectively). 4.5 µm spot spacing was used in all groups. Patients received complete ophthalmic examinations preoperatively, 1 day, 1 week, 1 month, and 3 months postoperatively.

Results:

UCVA in 1 day and 1 week postoperatively was better in groups with lower energy parameters: group 1 – 0.89±01.17, 0.96±0.15; group 2 – 0.94±0.13, 0.99±0.07; group 3 – 0.98±0,07, 1.00±0.05; group 4 – 0.94±0.07, 1.00±0.00. There were no significant differences between the groups, all eyes had UCVA 1.0 or better in 1 and 3 months postoperatively.

Conclusions:

SMILE using femtosecond energy of less than 150 nJ facilitates better visual acuity within the early postoperative period.

Financial Disclosure:

None