Posters

Visual and refractive outcomes after topography-guided photorefractive keratectomy and small-incision lenticule extraction

Poster Details

First Author: J.Reddy INDIA

Co Author(s):    S. Palla   P. Vaddavalli   -. -              

Abstract Details

Purpose:

To analyze refractive outcomes after ReLEx-SMILE (small incision lenticule extraction) and topography-guided photorefractive keratectomy (TCAT) in the treatment of myopia.

Setting:

Refractive Surgery Service, L V Prasad Eye Institute, Hyderabad, India.

Methods:

Patients undergoing either TCAT or SMILE and had a follow up of at least 3 months were included in the study. Uncorrected distance visual acuity (UCVA), corrected distance visual acuity (CDVA), corneal topography (Oculyzer-Topolyzer), aberrometry (iTrace) were examined preoperatively, at 1 and 3 months after the procedure. The WaveLight EX500 Excimer laser for photoablation and VisuMax was used for SMILE procedure.

Results:

One-hundred-twenty myopic eyes who underwent TCAT (60 eyes) and SMILE (60 eyes) were included in the study. The age, preoperative spherical equivalent and mean keratometry were comparable between the two groups. At 3-month UCVA, CDVA, spherical equivalent, mean keratometry, and aberrations were comparable between the two groups. The mean LogMAR UCVA was 0.0 or better and the postoperative residual SE was +/- 0.50 diopter in 85% of eyes in the TCAT group and 100% of eyes in the SMILE group. Lower amounts of induced coma (p=0.02) and spherical aberration (P=04) were seen in TCAT and SMILE groups respectively.

Conclusions:

Accuracy, safety, and efficacy were similar in the two groups. TCAT and SMILE profiles provided es¬sentially equivalent outcomes after myopic PRK, with induction of fewer lower order aberrations and higher order aberrations following TCAT ablation.

Financial Disclosure:

None