Posters

Results of ReLEx SMILE for patients with thin cornea: short-term outcomes

Poster Details

First Author: E.Eskina RUSSIA

Co Author(s):    K. Davtyan                    

Abstract Details

Purpose:

Evaluate  the safety, efficacy, stability, and predictability of small-incision lenticule extraction at 6-month follow-up for patient with thin cornea. Although evaluate the posterior corneal surface changes after ReLEx SMILE using SCHWIND SIRIUS, a three-dimensional rotating Scheimpflug camera with a Placido disc topographer to assess corneal changes with regard highest point of ectasia  of posterior surface ( KVb-index) and thinnest point of cornea.

Setting:

There are 3 generation of laser correction of vision in modern ophthalmology. The main differences the ReLEx SMILE from others is possibility to have laser correction of vision without creation flap and defect of epithelium. Many surgeons prefer do this method correction of vision for patient with thin cornea.

Methods:

30 patients (60 eyes) with mean thickness of cornea 497 ± 9,57 ( from 471 to  500 mkm) were included in the analysis. The  mean age of 31,5±7 years ( from 18 to 44) . BCVA was 0,87±0,13 ( from 0,6 to 1,0), preoperative spherical equivalent (SE) was   -4,8 ± 2,2 from -9,875 to  -1,5 . Posterior surface parameters: KVb was 9 ±2,77 mkm ( from 3 to 16 mkm).Results were analyzed 6 months postop.

Results:

The average SE after the operation was -0,06± 0,24 . 91,8% (55 eyes) of patients were within ±0,5 D from target refraction, 94,3 % of patients  (56 eyes)had UCVA 0,8 and higher and 72,9 % of patient ( 44 eyes) achieved UCVA 1,0. There are no patient with lost lines  of the BCVA. The mean SE after 1,3,6 month was -0,14, -0,13, -0,06 respectively. No significant changes were observed in posterior corneal surfaces index like a KVb which was 10,8± 3,1 mkm (from 6 to 17 mkm) and thinnest point of cornea

Conclusions:

ReLEx SMILE for patient with thin cornea is safe, efficient, and predictable with high stability and accuracy. No sigh of  keratoectasia were observed analyzing highest point of ectasia  of posterior  corneal surface ( KVb-index) and thinnest point of cornea after 6 month of surgery. This method of vision correction is appropriate choice for patient with thin cornea. We need long –term result this operation to be sure of safety this method. Although required to analysis biomechanical parameters of cornea (corneal hysteresis, corneal resistance factor).

Financial Disclosure:

None