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مقاله
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Abstract
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Title:
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A Study of Corneal Biomechanics in Patients following DSAEK Surgery Compared with Healthy Eyes
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Author(s):
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Shiva Pirhadi, Khosrow Jadidi, Farhad Nejat
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Presentation Type:
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Oral
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Subject:
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Cornea and Anterior Segment
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Others:
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Presenting Author:
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Name:
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Shiva Pirhadi
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Affiliation :(optional)
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Department of Biomedical Engineering, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran
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E mail:
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shv_prhd@yahoo.com
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Phone:
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22247232
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Mobile:
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09125136330
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Purpose:
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To evaluate the corneal biomechanical properties following descemet stripping automated endothelial keratoplasty (DSAEK) surgery, compared to healthy eyes using Corneal Visualization Scheimpflug Technology (Corvis ST, Oculus).
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Methods:
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This study included 22 eyes after DSAEK surgery and 20 healthy eyes. Thirty-three dynamic corneal response parameters provided by Corvis ST were measured in both groups.
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Results:
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The mean age of patients in DSAEK and control groups were 65.59 ± 10.27 and 54.40 ± 3.77 years old, respectively. Mean follow-up time in DSAEK group was 2.19 ± 1.85 years. The following parameters were significantly higher in DSAEK eyes than in the healthy eyes: highest concavity deformation amplitude (P=0.006), A1 deflection length (P=0.005), highest concavity deflection amplitude (P=0.036), maximum inverse radius (P=0.006), deformation amplitude ratio (2 mm) (P=0.048), integrated radius (P=0.003), stiffness parameter (SP-A1) (P=0.014) and Corvis biomechanical index (CBI) (P=0.046). Radius (P=0.001) and A1 time (P=0.019) variables were significantly lower after DSAEK compared to healthy eyes.
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Conclusion:
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It was expected that rigidity of the cornea would improve with increasing eye thickness after DSAEK surgery, but changes in biomechanical parameters showed that corneal biomechanics has decreased.
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Attachment:
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