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. 2024 May 23;13(11):3058.
doi: 10.3390/jcm13113058.

Clinical Outcomes of Transepithelial Photorefractive Keratectomy Performed with Smart Pulse Technology for the Correction of Moderate to High Myopia

Tony Ho  1
Affiliations

Clinical Outcomes of Transepithelial Photorefractive Keratectomy Performed with Smart Pulse Technology for the Correction of Moderate to High Myopia

Tony Ho. J Clin Med. .

Abstract

Purpose: To evaluate the safety and efficacy of the transepithelial photorefractive keratectomy (TransPRK) performed using smart pulse technology (SPT) in myopic eyes with refractive error ranging from -5.25 D to -9.75 D. Methods: This retrospective study evaluated the outcomes of SPT-assisted TransPRK in 150 eyes performed using a 1050 Hz AMARIS excimer laser. Results: At 6 months postoperative, 98% of eyes achieved uncorrected distance visual acuity (UDVA) of 20/25 or better, and postoperative UDVA within one line of preoperative corrected distance visual acuity (CDVA). No eyes lost any line of CDVA. Residual spherical equivalent refraction and cylinder within ±0.50 D of intended correction were achieved in 72% and 67% of eyes, respectively. Ninety-seven percent of eyes reported no halos and glare. Conclusions: TransPRK using a 1050 Hz excimer laser with SPT showed excellent predictability, safety, and efficacy for moderate to high myopia correction.

Keywords: Schwind AMARIS excimer laser; moderate to high myopia correction; photorefractive keratectomy; smart pulse technology; transepithelial photorefractive keratectomy.

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Conflict of interest statement

The author declares no conflicts of interest.

Figures

Figure 1
Figure 1
Outcomes of transepithelial advanced surface ablation conducted with the 1050 Hz excimer laser coupled with the smart pulse technology ablation software (Version 6.1.2117) at six months postoperative. (A) Efficacy chart depicting cumulative 6-month postoperative UDVA and preoperative CDVA; (B) Difference between uncorrected distance visual acuity postoperatively and corrected distance visual acuity preoperatively; (C) Change in Snellen lines of CDVA from preop to 6 months postop; (D) Scatterplot of Attempted versus achieved spherical equivalent refraction (square boxes represent the attempted versus achieved spherical equivalent refraction of each eye). The blue line indicates that achieved refraction is equal to attempted refraction. Green lines indicate eyes within ±0.5 D of attempted refraction, and purple lines indicate eyes within ±1.00 D of attempted refraction; (E) Accuracy of spherical equivalent refraction to the intended target; (F) Refractive astigmatic accuracy; (G) Scatterplot of TIA (target-induced astigmatism) versus SIA (surgically-induced astigmatism) (square boxes represent the TIA versus SIA of each eye). The blue line indicates TIA is equal to SIA. Green lines indicate eyes within ±0.5 D of TIA, and purple lines indicate eyes within ±1.00 D of TIA; (H) Angle of error graph.
Figure 1
Figure 1
Outcomes of transepithelial advanced surface ablation conducted with the 1050 Hz excimer laser coupled with the smart pulse technology ablation software (Version 6.1.2117) at six months postoperative. (A) Efficacy chart depicting cumulative 6-month postoperative UDVA and preoperative CDVA; (B) Difference between uncorrected distance visual acuity postoperatively and corrected distance visual acuity preoperatively; (C) Change in Snellen lines of CDVA from preop to 6 months postop; (D) Scatterplot of Attempted versus achieved spherical equivalent refraction (square boxes represent the attempted versus achieved spherical equivalent refraction of each eye). The blue line indicates that achieved refraction is equal to attempted refraction. Green lines indicate eyes within ±0.5 D of attempted refraction, and purple lines indicate eyes within ±1.00 D of attempted refraction; (E) Accuracy of spherical equivalent refraction to the intended target; (F) Refractive astigmatic accuracy; (G) Scatterplot of TIA (target-induced astigmatism) versus SIA (surgically-induced astigmatism) (square boxes represent the TIA versus SIA of each eye). The blue line indicates TIA is equal to SIA. Green lines indicate eyes within ±0.5 D of TIA, and purple lines indicate eyes within ±1.00 D of TIA; (H) Angle of error graph.
Figure 1
Figure 1
Outcomes of transepithelial advanced surface ablation conducted with the 1050 Hz excimer laser coupled with the smart pulse technology ablation software (Version 6.1.2117) at six months postoperative. (A) Efficacy chart depicting cumulative 6-month postoperative UDVA and preoperative CDVA; (B) Difference between uncorrected distance visual acuity postoperatively and corrected distance visual acuity preoperatively; (C) Change in Snellen lines of CDVA from preop to 6 months postop; (D) Scatterplot of Attempted versus achieved spherical equivalent refraction (square boxes represent the attempted versus achieved spherical equivalent refraction of each eye). The blue line indicates that achieved refraction is equal to attempted refraction. Green lines indicate eyes within ±0.5 D of attempted refraction, and purple lines indicate eyes within ±1.00 D of attempted refraction; (E) Accuracy of spherical equivalent refraction to the intended target; (F) Refractive astigmatic accuracy; (G) Scatterplot of TIA (target-induced astigmatism) versus SIA (surgically-induced astigmatism) (square boxes represent the TIA versus SIA of each eye). The blue line indicates TIA is equal to SIA. Green lines indicate eyes within ±0.5 D of TIA, and purple lines indicate eyes within ±1.00 D of TIA; (H) Angle of error graph.
Figure 2
Figure 2
Incidence of corneal haze at 6 months postoperative.
Figure 3
Figure 3
Incidence of halos/glare at 6 months postoperative.
Figure 4
Figure 4
Incidence of postoperative dry eye.
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