A three-year observation of corneal backscatter after small incision lenticule extraction

Session Details

Session Title: SMILE, LASIK and Re-treatment

Session Date/Time: Monday 09/10/2017 | 14:30-16:00

Paper Time: 14:36

Venue: Room 2.1

First Author: : X.Zhou CHINA

Co Author(s): :    T. Han   J. Zhao                 

Abstract Details

Purpose:

To investigate changes in corneal backscatter after small incision lenticule extraction (SMILE).

Setting:

Retrospective comparative study.

Methods:

One eye was randomly selected from 34 patients who underwent SMILE procedures. Corneal backscatter was analyzed using Scheimpflug technology before surgery and at postoperative 1 day, 1 week, 1 month, 3, 6, 12 months and 3 years. Three different corneal depths (the anterior 120 μm, the center, and the posterior 60 μm) and three concentric radial zones (0-2 mm, 2-6 mm, and 6-10 mm) were analyzed. Another 40 eyes of 40 patients who underwent femtosecond laser-assisted LASIK (FS-LASIK) were examined before surgery and at postoperative 1 day and 3 years as the control group.

Results:

t postoperative day 1, a significant increase was detected in the SMILE group compared to preoperative values in the central 0-6 mm zones of the anterior layer and the 0-2 mm zone of the central layer (P< 0.01). This increase was higher than that in the FS-LASIK group in the central 0-6 mm zones of the anterior and central layers (P< 0.01). Compared to preoperative values, no significant differences were detected at 1-week, 1, 3, 6, and 12-month follow-ups after SMILE, and a significant decrease was detected in all zones in both groups at postoperative year 3 (P < 0.001).

Conclusions:

Corneal backscatter peaks and declines to the baseline in the early period after SMILE procedures and corneal transparency achieves an improvement within postoperative three years.

Financial Disclosure:

NONE