RT Journal Article
T1 Influence of Preoperative Astigmatism Type and Magnitude on the Effectiveness  of SMILE Correction
A1 Pérez Izquierdo, Ricardo
A1 Rodríguez Vallejo, Manuel
A1 Matamoros, Alicia
A1 Martínez, Javier
A1 Garzón Jiménez, Nuria
A1 Poyales Galán, Francisco
A1 Fernández, Joaquín
AB PURPOSE: To assess the effectiveness of small incision lenticule extraction (SMILE) as a function of the  astigmatism level and type.METHODS: A total of 102 right eyes were included in this study. Refractive astigmatism and corneal  astigmatism measured with Scheimpflug technology were retrieved from the preoperative visit and the 3-month  follow-up visit. Patients were split into three groups according to the preoperative refractive astigmatism  (0.50, 0.75 to 1.25, and 1.50 diopters [D] or greater) and the effectiveness among each group was evaluated  according to the with-the-rule (WTR), against-the-rule (ATR), and oblique classifications. The standard  Alpins method was used for the analysis.RESULTS: Resultant astigmatism was not associated with its preoperative classification when the total sample  was considered, but a significant association emerged between the presence of resultant astigmatism and its  preoperative classification in the 1.50 D or greater group. The magnitude of error was significantly lower in  the WTR (median: -0.30 D) than in the oblique and ATR astigmatism groups, resulting in a coefficient of  adjustment of 1.13 for WTR astigmatism of 1.50 D or greater but not for the other types.CONCLUSIONS: Astigmatism correction with SMILE is predictable for astigmatism lower than 1.50 D without the  need to apply a correction. However, higher undercorrection is present in WTR astigmatism of 1.50 D or greater.
PB Slack Corporated
SN 1081-597X
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/12967
UL https://hdl.handle.net/20.500.14352/12967
LA eng
NO Submitted: April 18, 2018; Accepted: November 26, 2018
DS Docta Complutense
RD 6 may 2024