Pentacam Scheimpflug Evaluation of Corneal Volume After LASIK

Diniz, Camila Melo Gadelha Pereira; Hazarbassanov, Rossen Mihaylov; Yamazaki, Ester Sakae; Murata, Celina; Mallmann, Felipe; Campos, Mauro

doi:10.3928/1081597x-20091105-03

Cited by 7 publications

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“…In our study, we also evaluated corneal volume, which has also been described as a reliable index of the corneal morphology after corneal refractive surgery as well as after corneal transplantation. [12][13][14]28 The larger lenticule, with its increased thickness and diameter compared with the ablation depth and diameter, has resulted in a greater postoperative decrease of corneal volume in SMILE at 2 months postoperatively. However, our outcomes showed a similar increase of CVD in all measured zones after the 2-month examination in both techniques.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies have examined the short-term postoperative changes of the corneal morphology with focus on CTSP, CVD, and Q to assess the morphological stability of the cornea after SMILE and femtosecond laser-assisted LASIK (FS-LASIK). 4,[12][13][14] All of them, however, have investigated the short-term changes of these indices. To the best of our knowledge, there are no studies that assess the long-term changes of the corneal morphology.…”

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confidence: 99%

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Corneal Remodeling After Myopic SMILE Versus FS-LASIK: A Spatial Analysis of Short- and Mid-Term Corneal Thickness, Volume, and Shape Changes

Lazaridis

Spiru

Giallouros

et al. 2021

Cornea

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To evaluate the short-and mid-term changes of corneal thickness spatial profile (CTSP), corneal volume distribution (CVD), and corneal asphericity after small-incision lenticule extraction (SMILE) for correction of myopia and astigmatism and compare the results with femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK).Method: Thirty eyes of 18 patients who underwent SMILE were compared with a group of 30 eyes of 16 patients who underwent FS-LASIK. The groups were matched for preoperative central corneal thickness and lenticule thickness/ablation depth. Scheimpflug corneal tomography was performed preoperatively and postoperatively at 2 months and 3 years. The CTSP was evaluated on 4 concentric rings (2, 4, 6, and 8 mm). The CVD was evaluated at 3 concentric zones (3, 5, and 7 mm). Changes in the anterior and posterior asphericity at a 6-mm zone were also evaluated.Results: Between the 2-month and 3-year examination, the CTSP showed a similar increase for both groups at all measured points and rings (P $ 0.168). The CVD also showed a similar increase for both groups at all measured zones (P $ 0.278). The anterior corneal asphericity remained stable after SMILE (2-mo Q = 0.46 6 0.27; 3-yr Q = 0.45 6 0.27; P = 0.711) but decreased significantly after FS-LASIK (2-mo Q = 0.52 6 0.47; 3-yr Q = 0.47 6 0.44; P = 0.028). Similarly, the posterior corneal asphericity remained stable after SMILE (2-mo Q = 20.11 6 0.15; 3-yr Q = 20.11 6 0.13; P = 0.902) but decreased significantly after FS-LASIK (2-mo Q = 20.13 6 0.14; 3-yr Q = 20.16 6 0.15; P = 0.034).Conclusions: CTSP and CVD between the 2-month and 3-year examination showed a similar increase after SMILE and FS-LASIK. During the postoperative course, the anterior and posterior corneal asphericity remained more stable after SMILE compared with FS-LASIK.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%