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Table 1 SMILE reported outcomes for the treatment of refractive myopic astigmatism with cylinder ≥0.75 D

From: Small incision lenticule extraction (SMILE) in the correction of myopic astigmatism: outcomes and limitations - an update

Author Procedure N Mean cylinder (D) Efficacy index Safety index Predictability Correction index Difference vector Magnitude of error Angle of error b Follow up
Pedersen [20] SMILE 101 −1.81 NA; 49% of eyes postop UDVA ≥ preop CDVA NA; 9% lost one line in CDVA 70% of eyes within ±0.5 D of refractive cylinder 0.94 0.31 0.12 0.34 12 months
Chan [23]a SMILE 54 −1.08 0.85; 76% achieved a UDVA of 20/25 0.97; 7.4% lost one line in CDVA 87% of eyes within ±0.5 D of refractive cylinder 0.858a 0.349a −0.225a 6.38a 3 months
Chan [23]a f-LASIK 57 −1.37 0.94; 95% achieved a UDVA of 20/25 0.98; 5.3% lost one line in CDVA 98.2% of eyes within ±0.5 D of refractive cylinder 1.020a 0.090a 0.037a −0.72a 3 months
Zhang [24] SMILE 42 −2.48 93% UDVA ≥20/25 0% lost CDVA lines Mean postop refractive cylinder of −0.38 ± 0.42 D 0.88 0.36 −0.31 1.22 3 months
Zhang [24] f-LASIK 22 −2.56 91% UDVA ≥20/25 0% lost CDVA lines Mean postop refractive cylinder of −0.42 ± 0.45 D 0.94 0.42 −0.23 −1 3 months
Ganesh [27] SMILE 81 −1.85 NA; 61% of eyes postop UDVA ≥ preop CDVA NA; 0% lost one line in CDVA 86% of eyes within ±0.5 D of refractive cylinder 0.95 0.33 −0.108 4.09 (absolute AE) 3 months
Qian [30]c SMILE 28 (25) −1.35 (−2.50) NA NA Mean postop refractive cylinder of −0.42 (−0.48) D 0.94 (0.94) NA NA NA 6 months
Qian [30]c LASEK 17 (14) −1.27 (−2.55) NA NA Mean postop refractive cylinder of −0.27 (−0.89) D 0.97 (0.77) NA NA NA 6 months
  1. N = number of eyes; NA = Information not available; SMILE = Small incision lenticule extraction; LASEK = laser-assisted subepithelial keratectomy; f-LASIK = femtosecond-assisted laser in-situ keratomileusis; UDVA = uncorrected distance visual acuity; CDVA = corrected distance visual acuity
  2. aOutcomes reported for low and moderate astigmatism; the presented vector analysis is the specific one for the moderate astigmatism subgroup >1.5D of refractive cylinder; bArithmetic Angle of Error; cOutcomes reported for moderate (1–2 D of cylinder) astigmatism in periods are shown the outcomes for the high (> 2 D) astigmatism subgroup