Comparison of visual and refractive outcomes between transepithelial PRK and small incision lenticule extraction

Session Details

Session Title: SMILE vs PRK, Ocular Surface Disease

Session Date/Time: Monday 24/09/2018 | 08:00-10:30

Paper Time: 08:50

Venue: Room A3, Podium 3

First Author: : L.Hu CHINA

Co Author(s): :    H. Zhou   Z. Hu   M. Lin   J. Huang   F. Lu        

Abstract Details

Purpose:

To compare the visual and refractive outcomes of transepithelial photorefractive keratectomy（t-PRK） with small incision lenticule extraction (SMILE) in terms of visual acuity, aberrations and contrast sensitivity(CS).

Setting:

The study was prospectively conducted from January 2017 to August 2017, among patients at the Eye Hospital of Wenzhou Medical University.

Methods:

72 eyes treated with SMILE and 60 eyes treated with t-PRK were rolled in this study. Visual acuity, subjective manifest refraction, aberrations and CS before and 1month, 3months, 6 months after the surgery were analyzed for both groups. Total HOAs, spherical aberrations, coma and trefoil were calculated over the 4-mm-diameter central corneal zone.

Results:

6 months after surgery, the mean SE was 0.13±0.38D in the t-PRK group and 0.18±0.38D in the SMILE group (p = 0.48). 87% of t-PRK eyes and 90% of SMILE eyes had an uncorrected distance visual acuity of 0 logMar or better (p = 0.85). Further-more, Total HOAs, spherical aberration, coma and trefoil increased postoperatively in both groups. However, there was no statistically significant difference between the groups preoperatively and postoperatively except spherical aberration in 1 month(p<0.05). As to CS, 18c/d CS in t-PRK group was higher than SMILE group after 6 months.

Conclusions:

After 6 months follow-up, t-PRK and SMILE result in comparable refractive results. In addition, corneal aberrations induced by different techniques seemed similar. The contrast sensitivity after t-PRK may be slightly better compared to SMILE.

Financial Disclosure:

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