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각막이식수술 후 동적 샤임플러그 분석 장비를 이용한 각막의 생역학적 특성 변화

The Use of a Dynamic Scheimpflug Analyzer to Measure Changes of Post-keratoplasty Corneal Biomechanical Properties

대한안과학회지 2020년 61권 6호 p.597 ~ 602
박서진 ( Park Seo-Jin ) - Yonsei University College of Medicine Department of Ophthalmology

전익현 ( Jun Ik-Hyun ) - Yonsei University College of Medicine Department of Ophthalmology
서경률 ( Seo Kyoung-Yul ) - Yonsei University College of Medicine Department of Ophthalmology
김응권 ( Kim Eung-Kweon ) - Yonsei University College of Medicine Department of Ophthalmology
김태임 ( Kim Tae-Im ) - Yonsei University College of Medicine Department of Ophthalmology

Abstract


Purpose: To evaluate the biomechanical properties of corneas using a dynamic Scheimpflug analyzer (Corvis ST) after penetrating keratoplasty (PKP) and Descemet’s membrane stripping keratoplasty (DSEK).

Methods: The medical records of 11 eyes that had undergone PKP (PKP group) and 11 eyes that had undergone DSEK (DSEK group) from March 2017 to March 2018 and the results were compared with 20 eyes of the control group. All patients’ corneal biomechanical properties, including a deformation amplitude ratio of 2.0 mm (DA ratio 2.0 mm), integrated inverse radius (IntInvRad), stiffness parameter at first applanation (SP-A1), and Ambrosio relational thickness through the horizon meridian (ARTh) were measured and compared with those of the normal control group. In addition, biomechanically corrected intraocular pressure (bIOP) measured by the Corvis ST was compared with intraocular pressure measured by a Tono-Pen Applanation Tonometer (IOP-Tono-Pen).

Results: In the PKP group, the biomechanical properties using the Corvis ST showed a significantly lower DA ratio 2.0 mm, SP-A1, ARTh, and IntInvRad, compared with those of the control group. However, in the DSEK group, only ARTh was significantly lower than that of the control group.

Conclusions: Corvis ST can be used to measure the change of corneal biomechanical properties after corneal transplantation.

키워드

Corneal biomechanical properties; Corvis ST; Descemet’s membrane stripping keratoplasty; Penetrating keratoplasty
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