Comparison of changes in refractive error and corneal curvature following small-incision lenticule extraction and femtosecond laser-assisted in situ keratomileusis surgery

Zhang, Ya L; Cao, Li J; Chen, Hong W; Xu, Xiang H; Li, Zhao N; Liu, Lei

doi:10.4103/ijo.ijo_366_18

Cited by 9 publications

(1 citation statement)

References 35 publications

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“…However, it may have a certain impact on the anterior segment. To date, there have been few related reports, and the observation time was short [8][9]; changes in the anterior chamber structure may have an impact on the occurrence and management of intraocular diseases in patients. Pentacam, one of the most widely used instruments for detecting the corneal morphology, is a new anterior segment analysis system introduced by OCULUS, a German company, which uses a 360° rotating probe to scan the anterior segment of the eye and obtain Scheimp ug images.…”

Section: Discussionmentioning

confidence: 99%

Stability of anterior segments in patients with moderate and high myopia one year after SMILE

Liu

Zhu

et al. 2022

Preprint

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Background: SMILE is one of the most leading-edge corneal refractive surgery.In our study, we aim to investigate the stability of anterior segments in patients with moderate and high myopia one year after SMILE. Methods: 30 eyes of 15 patients who underwent SMILE surgery from July 2020 to January 2021 were collected, including 7 males and 8 females, aged from 20 to 37 years (average 27.20 ± 5.40 years old). Pentacam AXL anterior segment analyzer was performed before operation, 1 month and 1 year after operation to measure the relevant data of anterior segments, including the elevation of posterior corneal surface, Q value of anterior and posterior corneal surface (8mm), curvature of anterior and posterior corneal surface, central anterior chamber depth (ACD), anterior chamber volume and peripheral anterior chamber angle (ACA). Results: all the operations were successful without complications. There were significant differences in preoperative and postoperative equivalent spherical lens, average curvature(km) of anterior and posterior corneal surface , posterior elevation at the thinnest corneal point and Q value of anterior and posterior corneal surface (F = 755.055, P < 0.05; F = 700.001, P < 0.05; F = 3.494, P = 0.037, P < 0.05; F = 8.374, P = 0.001; F = 393.012, P < 0.05; F = 28.179, P < 0.05). There was no significant difference in posterior elevation at the apex corneal point(F = 0.301, P = 0.693＞0.05); Among them, there was significant difference in equivalent spherical lens,posterior elevation at the thinnest corneal point , Q value of anterior and posterior corneal surface between before operation and two points of time after operation (P < 0.05), and there was no significant difference between the two points of time after operation (P = 0.051,1.000,0.805,0.531 > 0.05); The pairwise comparison between the three groups were statistically significant in the mean corneal anterior surface curvature (P < 0.05); There was significant difference in the mean corneal posterior surface curvature between preoperative and 1 month after operation (P = 0.047 < 0.05), but there was no significant difference between preoperative and 1 year after operation, between 1 month after operation and 1 year after operation (P=0.117,1.000>0.05);The pairwise comparison among three groups were not statistically significant (P = 1.000 > 0.05); There were significant differences in anterior chamber depth (ACD), anterior chamber volume (ACV) and anterior chamber angle (ACA) before operation and 1 month 1 year after operation (F = 52.649,95.697,10.520, P < 0.05); There was significant difference in ACD and ACV between before operation and two times after operation (P < 0.05); There was no significant difference in ACA between before operation and 1 month after operation (P = 0.297 > 0.05), but there was significant difference in ACA between before operation and 1 year after operation, 1 month after operation and 1 year after operation (P = 0.001,0.035 < 0.05). Conclusions: the corneal surface morphology before and after SMILE will change in the early stage, but it will gradually stabilize in the medium and long term, and the anterior chamber parameters change, which needs more attention.

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Section: Discussionmentioning

confidence: 99%

Stability of anterior segments in patients with moderate and high myopia one year after SMILE

Liu

Zhu

et al. 2022

Preprint

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Design and Conduct of Randomized Clinical Trials Evaluating Surgical Innovations in Ophthalmology: A Systematic Review

Azuara‐Blanco¹,

Carlisle²,

O’Donnell³

et al. 2023

American Journal of Ophthalmology

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Myopic outcome after intraocular lens implantation in a patient who previously had small-incision lenticule extraction

et al. 2022

JCRS Online Case Rep

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Introduction: This is a report of cataract surgery in a postsmall-incision lenticule extraction (SMILE) patient with low myopia. Patient and clinical findings:A 49-year-old man underwent bilateral SMILE 18 months previously, and the visual acuity of both eyes recovered to 20/20. The patient noticed a gradual reduction in visual acuity in his left eye and blurring for 3 months. The corrected distance visual acuity (CDVA) was 20/67 in his left eye. Diagnosis, intervention, and outcomes:The slitlamp examination revealed an anterior subcapsular cataract. The intraocular lens (IOL) power was calculated by using a multiformula averaging method. A standard femtosecond laser-assisted phacoemulsification cataract surgery was performed and a trifocal IOL implanted. 2 months after IOL implantation, the uncorrected distance visual acuity of the left eye was 20/33, the autorefraction values were À1.37 À0.25 × 146, and the CDVA was 20/20. Conclusions:This case report showed that current postrefractive IOL power calculation formulas or methods may lead to myopic outcomes in patients who previously received SMILE. A standard IOL calculation may be more suitable for such patients. Additional case studies are needed to accurately calculate IOL power after SMILE similar to laser in situ keratomileusis.

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Comparison of changes in refractive error and corneal curvature following small-incision lenticule extraction and femtosecond laser-assisted in situ keratomileusis surgery

Cited by 9 publications

References 35 publications

Stability of anterior segments in patients with moderate and high myopia one year after SMILE

Stability of anterior segments in patients with moderate and high myopia one year after SMILE

Design and Conduct of Randomized Clinical Trials Evaluating Surgical Innovations in Ophthalmology: A Systematic Review

Myopic outcome after intraocular lens implantation in a patient who previously had small-incision lenticule extraction

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