Preliminary Computer Simulation of the Effects of Radial Keratotomy

Biomechanical Modeling of Corneal Ectasia

“…Several computational models of the cornea have been devised to investigate the relationship between the curvature response and various surgical interventions. [21][22][23][24][25] Similar to other elastic models before it, the model presented predicts an immediate forward-shift of the cornea. This corneal "herniation" is the only response the elastic thin shell model can produce when the central cornea is weakened by tissue removal.…”

Biomechanical Modeling of Corneal Ectasia

“…Several computational models of the cornea have been devised to investigate the relationship between the curvature response and various surgical interventions. [21][22][23][24][25] Similar to other elastic models before it, the model presented predicts an immediate forward-shift of the cornea. This corneal "herniation" is the only response the elastic thin shell model can produce when the central cornea is weakened by tissue removal.…”

Intraocular lens power calculation after corneal refractive surgery

“…If standard keratometry instruments are used, this leads to an overestimation of the true corneal power [18]. There is also an overestimation of corneal power after radial keratectomy because of the greater flattening of the central cornea compared with the paracentral cornea [7,19]. These errors will lead to a more hyperopic result than intended after cataract surgery.…”

An inverse finite element method for determining the anisotropic properties of the cornea

“…Finite element models of the human cornea have been applied to analyze the outcome of LASIK and other refractive surgical procedures. Earlier efforts have treated the cornea as a homogeneous, isotropic, linear elastic or hyperelastic material (Bryant et al 1987;Hanna et al 1989;Bryant and McDonnell 1996). More recent studies have incorporated the effects of the collagen structure by modeling the cornea as an anisotropic linear elastic (Pinsky and Datye 1991;Bryant and Velinsky 1991;Bryant and McDonnell 1996) or anisotropic hyperelastic material.…”

Biomechanical Modeling of Corneal Ectasia

“…Several computational models of the cornea have been devised to investigate the relationship between the curvature response and various surgical interventions. [21][22][23][24][25] Similar to other elastic models before it, the model presented predicts an immediate forward-shift of the cornea. This corneal "herniation" is the only response the elastic thin shell model can produce when the central cornea is weakened by tissue removal.…”

Intraocular lens power calculation after corneal refractive surgery

“…If standard keratometry instruments are used, this leads to an overestimation of the true corneal power [18]. There is also an overestimation of corneal power after radial keratectomy because of the greater flattening of the central cornea compared with the paracentral cornea [7,19]. These errors will lead to a more hyperopic result than intended after cataract surgery.…”

An inverse finite element method for determining the anisotropic properties of the cornea

“…Finite element models of the human cornea have been applied to analyze the outcome of LASIK and other refractive surgical procedures. Earlier efforts have treated the cornea as a homogeneous, isotropic, linear elastic or hyperelastic material (Bryant et al 1987;Hanna et al 1989;Bryant and McDonnell 1996). More recent studies have incorporated the effects of the collagen structure by modeling the cornea as an anisotropic linear elastic (Pinsky and Datye 1991;Bryant and Velinsky 1991;Bryant and McDonnell 1996) or anisotropic hyperelastic material.…”

Biomechanical Modeling of Corneal Ectasia

“…Several computational models of the cornea have been devised to investigate the relationship between the curvature response and various surgical interventions. [21][22][23][24][25] Similar to other elastic models before it, the model presented predicts an immediate forward-shift of the cornea. This corneal "herniation" is the only response the elastic thin shell model can produce when the central cornea is weakened by tissue removal.…”

Intraocular lens power calculation after corneal refractive surgery

“…If standard keratometry instruments are used, this leads to an overestimation of the true corneal power [18]. There is also an overestimation of corneal power after radial keratectomy because of the greater flattening of the central cornea compared with the paracentral cornea [7,19]. These errors will lead to a more hyperopic result than intended after cataract surgery.…”

An inverse finite element method for determining the anisotropic properties of the cornea

“…Finite element models of the human cornea have been applied to analyze the outcome of LASIK and other refractive surgical procedures. Earlier efforts have treated the cornea as a homogeneous, isotropic, linear elastic or hyperelastic material (Bryant et al 1987;Hanna et al 1989;Bryant and McDonnell 1996). More recent studies have incorporated the effects of the collagen structure by modeling the cornea as an anisotropic linear elastic (Pinsky and Datye 1991;Bryant and Velinsky 1991;Bryant and McDonnell 1996) or anisotropic hyperelastic material.…”