Six-month results of refined vs conventional single-step TransPRK in correction of different degrees of astigmatism

Session Details

Session Title: Presented Poster Session: Keratorefractive Surgery Results II

Venue: Poster Village: Pod 2

First Author: : S.Adib-Moghaddam IRAN

Co Author(s): :    M. Razi-Khosroshahi   A. Haydar   S. Soleyman-Jahi   S. Arba Mosquera   I. Pallikaris           

Abstract Details

Purpose:

To compare refined and conventional platforms of single-step transepithelial photorefractive keratectomy (TransPRK) in correction of different degrees of astigmatism.

Setting:

Bina Eye Hospital, Tehran.

Methods:

In this retrospective study, 113 and 129 eyes with astigmatism underwent refined and conventional TransPRK, respectively. The same surgeon performed both methods using SCHWIND AMARIS laser. All eyes received Iran Regimen as postoperative medication. Patients were divided into three-subgroups: low (≥-1.5 D), moderate (between -1.5 and -2.5) and high (≤-2.5) astigmatism. Mean age of total patients was 28.71 ± 5.07 years and 181 (74.8%) eyes belonged to female patients. Mean preoperative astigmatism was -0.6 ± 0.60, -1.85 ± 0.25 and -3.48 ± 1.43 in the subgroups. Mann-Whitney U test, Independent-Samples t-test and Two sample t-test were applied for analysis appropriately.

Results:

Mean preoperative spherical equivalent and astigmatism in refined and conventional methods were (-3.92 ± 1.50 vs -3.40 ± 1.60, P=.98) and (-1.30 ± 1.10 vs -0.95 ± 1.40, P=.007), respectively. Postoperative astigmatism was significantly better in the refined method (-0.04 ± 0.14 vs -0.26 ± 0.99, P=.002). Low astigmatism subgroup in the refined TransPRK achieved a better postoperative UDVA (P<.001), CDVA (P<.001), photopic (P<.001) and mesopic (P=.004) contrast sensitivity compared to the conventional counterpart. Mean postoperative astigmatism of the three subgroups were comparable between refined and conventional methods (P=.214, P=.192, P=.332).

Conclusions:

Refined single-step TransPRK demonstrated better outcomes in correction of astigmatism in comparison to the conventional method. Better postoperative astigmatism was noticed in the refined method. Moreover, the low astigmatism subgroup in the refined method showed the better results.

Financial Disclosure:

... is employed by a competing company