RT Journal Article
T1 Comparing surgically induced astigmatism calculated by means of simulated keratometry versus total corneal refractive power.
A1 Garzón, Nuria
A1 Rodríguez-Vallejo, Manuel
A1 Carmona, David
A1 Calvo-Sanz, Jorge A
A1 Poyales, Francisco
A1 Palomino, Carlos
A1 Zato-Gómez de Liaño, Miguel Á
A1 Fernández, Joaquín
K1 Astigmatism
K1 cataract surgery
K1 multifocal intraocular lens
K1 posterior cornea
K1 surgically induced astigmatism
AB To evaluate surgically induced astigmatism as computed by means of either simulated keratometry (KSIM) or total corneal refractive power (TCRP) after temporal incisions. Prospective observational study including 36 right eyes undergoing cataract surgery. Astigmatism was measured preoperatively during the 3-month follow-up period using Pentacam. Surgically induced astigmatism was computed considering anterior corneal surface astigmatism at 3 mm with KSIM and considering both corneal surfaces with TCRP from 1 to 8 mm (TCRP3 for 3 mm). The eyes under study were divided into two balanced groups: LOW with KSIM astigmatism  Mean surgically induced astigmatism was higher in the HIGH group (0.31 D @ 102°) than in the LOW group (0.04 D @ 16°). The temporal incision resulted in a steepening in the HIGH group of 0.15 D @ 90°, as estimated with KSIM, versus 0.28 D @ 90° with TCRP3, but no significant differences were found for the steepening in the LOW group or for the torque in either group. Differences between KSIM- and TCRP3-based surgically induced astigmatism values were negligible in LOW group. Surgically induced astigmatism was considerably higher in the high-astigmatism group and its value was underestimated with the KSIM approach. Eyes having low astigmatism should not be included for computing the surgically induced astigmatism because steepening would be underestimated.
YR 2018
FD 2018-03-22
LK http://hdl.handle.net/10668/12262
UL http://hdl.handle.net/10668/12262
LA en
DS RISalud
RD Apr 8, 2025