Long-Term Results of Laser In Situ Keratomileusis in Myopic Patients with Topographic Indices outside Suggested Ranges

Hashemi, Hassan; Mehravaran, Shiva; Panahi, Parsa; Abdollahinia, Tahereh; Asgari, Soheila

doi:10.1007/s40123-022-00589-6

Cited by 2 publications

(2 citation statements)

References 21 publications

(29 reference statements)

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“…In addition, abnormal ndings at preoperative examination using Pentacam, such as inferior steepening is an important factor in developing postoperative ectasia. [11] Our study observed that NaF strip intervention did not cause a statistically signi cant change in K readings, including K1 and K2. We this conclude that refractive surgeon need not take this change into account in selecting the suction ring in LASIK and screening preoperative keratoconus or postoperative corneal ectasia.…”

Section: Discussionmentioning

confidence: 47%

Effect of Sodium Fluorescein Strip Application on Cornea Parameters Commonly Used in Laser-assisted in-situ Keratomileusis

Han¹,

Xie²,

Yuan³

et al. 2022

Preprint

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Purpose To assess the effects of sodium fluorescein (NaF) strips on corneal parameters commonly used in Laser-assisted in-situ keratomileusis (LASIK). Method Eighty-six subjects (172 eyes) scheduled for LASIK between January and March 2022 were recruited. Topographic measurements of corneal parameters, including central corneal thickness (CCT), anterior keratometric (K) readings (K1, flat keratometry; K2, steep keratometry), horizontal corneal diameter (white to white, WTW), and corneal asphericity (Q value), were obtained using a Scheimpflug device (Pentacam) before and 10 min after NaF strip treatment. Results The Pentacam recorded a small significant increase in CCT (mean 538.88 ± 28.78µm to 547.90 ± 29.94µm; p < .001, paired samples t-test), with no differences in K1 and K2 (mean 42.24 ± 1.35D to 42.24 ± 1.35D, and mean 43.34 ± 1.50D to 43.32 ± 1.51D; P > .05, Wilcoxon signed-rank test, for all), or WTW (mean 11.58 ± 0.32 mm to 11.58 ± 0.32 mm; P > .05, Wilcoxon signed-rank test) before and after treatment. Furthermore, there was no significant difference in the Q value (mean − 0.30 ± 0.13 to -0.30 ± 0.14; P > .05, paired samples t-test). Conclusions These results indicate that clinicians should avoid NaF strip application before obtaining precise topographic measurements of cornea parameters.

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Section: Discussionmentioning

confidence: 47%

Effect of Sodium Fluorescein Strip Application on Cornea Parameters Commonly Used in Laser-assisted in-situ Keratomileusis

Han¹,

Xie²,

Yuan³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…In LASIK, the appropriate suction ring is selected mainly depend on the corneal steepness. In addition, abnormal findings at preoperative examination using the Pentacam, such as inferior steepening is one of important factors in developing postoperative ectasia 14 , 15 . Our study observed that NaF strip intervention did not cause a statistically significant change in K readings 15 , including K1 and K2.…”

Section: Discussionmentioning

confidence: 99%

Effect of sodium fluorescein strip application on cornea parameters commonly used in laser-assisted in-situ keratomileusis

Han,

Xie,

Yuan

et al. 2023

Sci Rep

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To assess the effect of sodium fluorescein (NaF) strip on corneal parameters commonly used in Laser-assisted in-situ keratomileusis (LASIK). Eighty-six subjects (172 eyes) scheduled for LASIK were recruited between January and March 2022. The study and statistical analysis test were conducted in April 2022. Topographic measurements of corneal parameters, including central corneal thickness (CCT), anterior keratometric (K) readings (K1, flat keratometry; K2, steep keratometry), horizontal corneal diameter (white to white, WTW), and corneal asphericity (Q value), were obtained using a Scheimpflug device (Pentacam) before and 10 min after NaF strip treatmentThe Pentacam recorded a small significant increase in CCT (mean 538.88 ± 28.78 μm to 547.90 ± 29.94 μm; p < .001), with no differences in K1 and K2 (mean 42.24 ± 1.35D to 42.24 ± 1.35D, and mean 43.34 ± 1.50D to 43.32 ± 1.51D; P > .05, for all) as well as WTW(mean 11.58 ± 0.32 mm to 11.58 ± 0.32 mm, P > .05) before and after NaF strip intervention. Furthermore, there was no significant difference was observed in Q value (mean − 0.30 ± 0.13 to − 0.30 ± 0.14, P > .05). These results indicate that clinicians should avoid NaF strip application before obtaining precise topographic measurements of cornea parameters using the Pentacam.

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Long-Term Results of Laser In Situ Keratomileusis in Myopic Patients with Topographic Indices outside Suggested Ranges

Abstract: Introduction: To investigate the long-term results of laser in situ keratomileusis (LASIK) in patients with one or more topographic indices outside the suggested range preoperatively. Methods: Patients who had conventional or femtosecond laser-assisted LASIK for myopia

Cited by 2 publications

References 21 publications

Effect of Sodium Fluorescein Strip Application on Cornea Parameters Commonly Used in Laser-assisted in-situ Keratomileusis

Effect of Sodium Fluorescein Strip Application on Cornea Parameters Commonly Used in Laser-assisted in-situ Keratomileusis

Effect of sodium fluorescein strip application on cornea parameters commonly used in laser-assisted in-situ keratomileusis

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