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- Title
Corneal biomechanical properties in 3 corneal transplantation techniques with a dynamic Scheimpflug analyzer.
- Authors
Maeda, Naoyuki; Fuchihata, Mutsumi; Fujimoto, Hisataka; Koh, Shizuka; Nishida, Kohji; Ueki, Ryotaro
- 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 ( R). 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 R 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 R, 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.
- Subjects
CORNEA surgery; CORNEAL transplantation; OPHTHALMOLOGY; CORNEAL topography; INTRAOCULAR pressure; ENDOTHELIAL cells
- Publication
Japanese Journal of Ophthalmology, 2014, Vol 58, Issue 6, p483
- ISSN
0021-5155
- Publication type
Article
- DOI
10.1007/s10384-014-0344-2