Changes in Corneal Curvature at Different Excimer Laser Ablative Depths

Biomechanical properties of the keratoconic cornea: a review

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Biomechanical properties of the keratoconic cornea: a review

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Patient-Specific Computational Modeling of Keratoconus Progression and Differential Responses to Collagen Cross-linking

“…However, the epithelium was not modeled as a separate entity due to its minimal contribution to corneal elastic behavior relative to the biomechanically predominant stroma. 54 Characteristic nonuniformities in epithelial thickness such as those demonstrated in normal eyes 55 and KC eyes 56 can mask underlying stromal curvature and introduce a source of modeling error. Because the keratoconic epithelium is typically thinnest over the cone, 56 epithelial debridement during CXL may unroof a steeper stroma, which could explain the appearance of a paradoxical steepening response in the first months 53 after CXL that is followed by progressive flattening.…”

Long-Term Changes of the Anterior Corneal Topography after Photorefractive Keratectomy for Myopia and Myopic Astigmatism

“…35,36,39,40 The cutting of a variable amount of anterior collagen lamellae (dependent on the refractive correction) from the central cornea could enhance these biomechanical inhomogeneities in the stroma. 41,42 A completely different response of the corneal periphery has been assessed after the correction of myopic astigmatism in comparison with simple myopic treatments. The corneal periphery steepened after the correction of myopic astigmatism during follow-up, although showing a higher variability than that of spherical treatments both preoperatively and postoperatively.…”

Biomechanical properties of the keratoconic cornea: a review

“……”

Patient-Specific Computational Modeling of Keratoconus Progression and Differential Responses to Collagen Cross-linking

“…However, the epithelium was not modeled as a separate entity due to its minimal contribution to corneal elastic behavior relative to the biomechanically predominant stroma. 54 Characteristic nonuniformities in epithelial thickness such as those demonstrated in normal eyes 55 and KC eyes 56 can mask underlying stromal curvature and introduce a source of modeling error. Because the keratoconic epithelium is typically thinnest over the cone, 56 epithelial debridement during CXL may unroof a steeper stroma, which could explain the appearance of a paradoxical steepening response in the first months 53 after CXL that is followed by progressive flattening.…”

Long-Term Changes of the Anterior Corneal Topography after Photorefractive Keratectomy for Myopia and Myopic Astigmatism

“…35,36,39,40 The cutting of a variable amount of anterior collagen lamellae (dependent on the refractive correction) from the central cornea could enhance these biomechanical inhomogeneities in the stroma. 41,42 A completely different response of the corneal periphery has been assessed after the correction of myopic astigmatism in comparison with simple myopic treatments. The corneal periphery steepened after the correction of myopic astigmatism during follow-up, although showing a higher variability than that of spherical treatments both preoperatively and postoperatively.…”

Biomechanical properties of the keratoconic cornea: a review

“……”

Patient-Specific Computational Modeling of Keratoconus Progression and Differential Responses to Collagen Cross-linking

“…However, the epithelium was not modeled as a separate entity due to its minimal contribution to corneal elastic behavior relative to the biomechanically predominant stroma. 54 Characteristic nonuniformities in epithelial thickness such as those demonstrated in normal eyes 55 and KC eyes 56 can mask underlying stromal curvature and introduce a source of modeling error. Because the keratoconic epithelium is typically thinnest over the cone, 56 epithelial debridement during CXL may unroof a steeper stroma, which could explain the appearance of a paradoxical steepening response in the first months 53 after CXL that is followed by progressive flattening.…”

Long-Term Changes of the Anterior Corneal Topography after Photorefractive Keratectomy for Myopia and Myopic Astigmatism

“…35,36,39,40 The cutting of a variable amount of anterior collagen lamellae (dependent on the refractive correction) from the central cornea could enhance these biomechanical inhomogeneities in the stroma. 41,42 A completely different response of the corneal periphery has been assessed after the correction of myopic astigmatism in comparison with simple myopic treatments. The corneal periphery steepened after the correction of myopic astigmatism during follow-up, although showing a higher variability than that of spherical treatments both preoperatively and postoperatively.…”