Corneal biomechanical properties in 3 corneal transplantation techniques with a dynamic Scheimpflug analyzer

Naoyuki Maeda, Ryotaro Ueki, Mutsumi Fuchihata, Hisataka Fujimoto, Shizuka Koh, Kohji Nishida

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Purpose: To compare the corneal biomechanical properties of eyes that have undergone penetrating keratoplasty (PK), deep anterior lamellar keratoplasty (DALK), and Descemet stripping automated endothelial keratoplasty (DSAEK).

Methods: This case–control study comprised 20 post-PK eyes, 14 post-DALK eyes, 15 post-DSAEK eyes, and 50 normal control eyes. A dynamic Scheimpflug analyzer (the Corvis ST) was used to evaluate the corneal biomechanical properties including deformation amplitude (DA) and radius at the highest concavity (Rhc).

Results: In post-PK eyes, the mean DA was 1.20 ± 0.13 mm, which was significantly higher than those of the control eyes (1.07 ± 0.09) and the post-DSAEK eyes (1.08 ± 0.12). The DA (1.18 ± 0.18) in the post-DALK eyes was significantly higher than in the control eyes. The Rhc in the post-PK (6.34 ± 0.37 mm), -DALK (6.04 ± 1.22), and -DSAEK (6.44 ± 0.58) eyes was significantly smaller than in the control eyes (7.57 ± 0.78).

Conclusions: The dynamic Scheimpflug analyzer provides a method to obtain new biomechanical information on the cornea such as the DA and Rhc, and these parameters differed among eyes that had undergone 3 different types of corneal surgery. Abnormalities in these parameters after the different corneal transplantation techniques may indicate larger deviations in the stress–strain reaction of the cornea and more uncertainty in the intraocular pressure measurements than in normal eyes.

Original languageEnglish
Pages (from-to)483-489
Number of pages7
JournalJapanese Journal of Ophthalmology
Volume58
Issue number6
DOIs
Publication statusPublished - Jan 1 2014

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Corneal Transplantation
Descemet Stripping Endothelial Keratoplasty
Penetrating Keratoplasty
Cornea
Intraocular Pressure
Uncertainty

All Science Journal Classification (ASJC) codes

  • Ophthalmology

Cite this

Corneal biomechanical properties in 3 corneal transplantation techniques with a dynamic Scheimpflug analyzer. / Maeda, Naoyuki; Ueki, Ryotaro; Fuchihata, Mutsumi; Fujimoto, Hisataka; Koh, Shizuka; Nishida, Kohji.

In: Japanese Journal of Ophthalmology, Vol. 58, No. 6, 01.01.2014, p. 483-489.

Research output: Contribution to journalArticle

Maeda, Naoyuki ; Ueki, Ryotaro ; Fuchihata, Mutsumi ; Fujimoto, Hisataka ; Koh, Shizuka ; Nishida, Kohji. / Corneal biomechanical properties in 3 corneal transplantation techniques with a dynamic Scheimpflug analyzer. In: Japanese Journal of Ophthalmology. 2014 ; Vol. 58, No. 6. pp. 483-489.
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abstract = "Purpose: To compare the corneal biomechanical properties of eyes that have undergone penetrating keratoplasty (PK), deep anterior lamellar keratoplasty (DALK), and Descemet stripping automated endothelial keratoplasty (DSAEK).Methods: This case–control study comprised 20 post-PK eyes, 14 post-DALK eyes, 15 post-DSAEK eyes, and 50 normal control eyes. A dynamic Scheimpflug analyzer (the Corvis ST) was used to evaluate the corneal biomechanical properties including deformation amplitude (DA) and radius at the highest concavity (Rhc).Results: In post-PK eyes, the mean DA was 1.20 ± 0.13 mm, which was significantly higher than those of the control eyes (1.07 ± 0.09) and the post-DSAEK eyes (1.08 ± 0.12). The DA (1.18 ± 0.18) in the post-DALK eyes was significantly higher than in the control eyes. The Rhc in the post-PK (6.34 ± 0.37 mm), -DALK (6.04 ± 1.22), and -DSAEK (6.44 ± 0.58) eyes was significantly smaller than in the control eyes (7.57 ± 0.78).Conclusions: The dynamic Scheimpflug analyzer provides a method to obtain new biomechanical information on the cornea such as the DA and Rhc, and these parameters differed among eyes that had undergone 3 different types of corneal surgery. Abnormalities in these parameters after the different corneal transplantation techniques may indicate larger deviations in the stress–strain reaction of the cornea and more uncertainty in the intraocular pressure measurements than in normal eyes.",
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AU - Koh, Shizuka

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N2 - Purpose: To compare the corneal biomechanical properties of eyes that have undergone penetrating keratoplasty (PK), deep anterior lamellar keratoplasty (DALK), and Descemet stripping automated endothelial keratoplasty (DSAEK).Methods: This case–control study comprised 20 post-PK eyes, 14 post-DALK eyes, 15 post-DSAEK eyes, and 50 normal control eyes. A dynamic Scheimpflug analyzer (the Corvis ST) was used to evaluate the corneal biomechanical properties including deformation amplitude (DA) and radius at the highest concavity (Rhc).Results: In post-PK eyes, the mean DA was 1.20 ± 0.13 mm, which was significantly higher than those of the control eyes (1.07 ± 0.09) and the post-DSAEK eyes (1.08 ± 0.12). The DA (1.18 ± 0.18) in the post-DALK eyes was significantly higher than in the control eyes. The Rhc in the post-PK (6.34 ± 0.37 mm), -DALK (6.04 ± 1.22), and -DSAEK (6.44 ± 0.58) eyes was significantly smaller than in the control eyes (7.57 ± 0.78).Conclusions: The dynamic Scheimpflug analyzer provides a method to obtain new biomechanical information on the cornea such as the DA and Rhc, and these parameters differed among eyes that had undergone 3 different types of corneal surgery. Abnormalities in these parameters after the different corneal transplantation techniques may indicate larger deviations in the stress–strain reaction of the cornea and more uncertainty in the intraocular pressure measurements than in normal eyes.

AB - Purpose: To compare the corneal biomechanical properties of eyes that have undergone penetrating keratoplasty (PK), deep anterior lamellar keratoplasty (DALK), and Descemet stripping automated endothelial keratoplasty (DSAEK).Methods: This case–control study comprised 20 post-PK eyes, 14 post-DALK eyes, 15 post-DSAEK eyes, and 50 normal control eyes. A dynamic Scheimpflug analyzer (the Corvis ST) was used to evaluate the corneal biomechanical properties including deformation amplitude (DA) and radius at the highest concavity (Rhc).Results: In post-PK eyes, the mean DA was 1.20 ± 0.13 mm, which was significantly higher than those of the control eyes (1.07 ± 0.09) and the post-DSAEK eyes (1.08 ± 0.12). The DA (1.18 ± 0.18) in the post-DALK eyes was significantly higher than in the control eyes. The Rhc in the post-PK (6.34 ± 0.37 mm), -DALK (6.04 ± 1.22), and -DSAEK (6.44 ± 0.58) eyes was significantly smaller than in the control eyes (7.57 ± 0.78).Conclusions: The dynamic Scheimpflug analyzer provides a method to obtain new biomechanical information on the cornea such as the DA and Rhc, and these parameters differed among eyes that had undergone 3 different types of corneal surgery. Abnormalities in these parameters after the different corneal transplantation techniques may indicate larger deviations in the stress–strain reaction of the cornea and more uncertainty in the intraocular pressure measurements than in normal eyes.

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