Correction of astigmatism with small-incision lenticule extraction: Impact of against-the-rule and with-the-rule astigmatism

Almost 25% of the variation after small-incision lenticule extraction for myopic astigmatism might be explained by the size of the attempted cylinder correction and ATR/WTR astigmatism. Incorporating these parameters in preoperative planning might produce more consistent results in high cylinder corrections.