‘Gas bubble escape sign’: a new intraoperative predictor of immediate visual quality after SMILE

Session Details

Session Title: Presented Poster Session: Keratorefractive Surgery Results I

Venue: Poster Village: Pod 2

First Author: : R.Arra INDIA

Co Author(s): :    S. Ganesh   S. Brar                    

Abstract Details

Purpose:

To evaluate the ease of dissection and immediate post-operative quality of vision in eyes showing ‘Gas bubble escape’ sign versus no Gas bubble escape sign in patients undergoing SMILE for myopia and myopic astigmatism.

Setting:

Nethradhama Super-specialty Eye hospital, Bangalore

Methods:

In this prospective study, 100 eyes of 50 patients undergoing bilateral myopic SMILE surgery, wherein, 32 eyes (29 patients) showing GBE sign intraoperatively were compared with 32 eyes (20 patients) which did not show this sign. A single surgeon performed all surgeries using the same technique and energy parameters (energy=150 NJ, 4.5µ spot spacing). Post-op day 1 and  1 month, uncorrected distance visual acuity(UDVA), Objective Scatter Index(OSI) score and MTF cutoff were compared between the two groups using a double-pass system.

Results:

On day 1, the mean OSI score was significantly lower (0.78±0.32) in the GBE group compared to no-GBE group (1.11±0.90) (p=0.03). The mean UDVA was also significantly better in the GBE group (p=0.001). MTF cutoff was comparable between both groups. However, at one month all the above parameters were comparable between the two study groups (p > 0.05).

Conclusions:

Gas Bubble escape sign may be a useful indicator of energy optimization and potentially result in good visual outcomes in the immediate post-op period following SMILE procedure.

Financial Disclosure:

... travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented