Journals / Van Tıp Dergisi / 2018 / Cilt: 25 - Sayı: 3

Assesment of Central Corneal Thickness Using Corneal Dynamic Scheimpflug Analyzer Corvis ST, Sirius Kombine Scheimpflug-Placido Disk System and RTVue Anterior Segment Optical Coherence Tomography in Normal Eyes

Normal Gözlerde Merkezi Kornea Kalınlığının Corvis ST Kornea Biodinamik Scheimpflug Analiz Sistemi, Sirius Kombine Scheimpflug-Placido Disk Sistemi ve Rtvue Ön Segment Optik Koherens Tomografi ile Değerlendirilmesi

Pages
381–385
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Since measurements performed by OCT were thinner than other devices, OCT can be used in clinical practice when minor changes are critical in CCT measurement.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: To examine the repeatability of central corneal thickness (CCT) measurements by corneal dynamic Scheimpflug analyzer Corvis ST (Corvis), RTVue anterior segment optical coherence tomography (OCT) and Sirius corneal topography (Sirius) in normal eyes and compare the agreement of devices with each other.
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Key Findings & Data:Materials and Methods: Forthy right eyes of 40 patients were included in the study.
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Conclusion & Impact:Since measurements performed by OCT were thinner than other devices, OCT can be used in clinical practice when minor changes are critical in CCT measurement.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: To examine the repeatability of central corneal thickness (CCT) measurements by corneal dynamic Scheimpflug analyzer Corvis ST (Corvis), RTVue anterior segment optical coherence tomography (OCT) and Sirius corneal topography (Sirius) in normal eyes and compare the agreement of devices with each other. Materials and Methods: Forthy right eyes of 40 patients were included in the study. Patients with active ocular pathology and a history of ocular trauma were excluded. All measurements were performed from 12:00 to 15:00 by the same physician. Results: The mean age of the subjects was 35,5±2,3 and 22 were males and 18 were females. Interclass correlation coefficient was 0.993 for Corvis, 0,998 for OCT and 0.990 for Sirius. CCT was 8,4u thinner in OCT compared with CORVIS and 4,0u thinner compared with Sirius. Limits of Agreement (LoA) of devices was -6,7 to 14.7u for Corvis and Sirius, -25.6u to 8.8u for Corvis and OCT, -19.9 to 13.0u for Sirius and OCT. Two devices which had the narrow LoA (which means the best agreement with each other) were Sirius and Corvis. Conclusion: It has been observed that repeatibility of all three devices were very good for CCT measurement. Agreement of Sirius and Corvis was better when compared with other devices. Thus, Corvis and Sirius can be alternatively used in clinical practice. Since measurements performed by OCT were thinner than other devices, OCT can be used in clinical practice when minor changes are critical in CCT measurement.

Özet

Amaç: Merkezi kornea kalınlığının (MKK) değerlendirilmesinde Sirius Kombine Scheimpflug-Plasido Disk Sistemi (Sirius), RTVue ön segment optik koherens tomografi (OKT) ve Corvis ST biomekanik ön segment analiz sisteminin (Corvis) tekrarlanabilirliğinin ve bi rbiriyle uyumunun araştırılmasıdır. Gereç ve Yöntem: Kırk normal hastanın sağ gözü çalışmaya alındı. Aktif göz patolojisi olan ve oküler travma öyküsü olan hastalar çalışma dışı bırakıldı. Tüm ölçümler saat 12 -15 arasında yapıldı. Ölçümler aynı kişi tarafından 15 dakika arayla yapıldı. Bulgular: Hastaların ortalama yaşı 35,5±2,3 olup 22’si kadın, 18’i erkekti. Sınıf içi korelasyon katsayısı Corvis’te 0,993, OKT’de 0,998 iken Sirius’ta 0,990 idi. MKK’yı OKT Corvis’den 8,4u, Sirius’tan +4u daha ince ölçmekteydi. Cihazların birbiriyle uyum aralığı Corvis ve Sirius arasında - 6,7u ile 14.7u, OKT ve Corvis arasında -25.6u ile 8.8u, OKT ve Sirius arasında -19.9u ile 13.0u aralığında idi. Uyum aralığı en dar olan yani birbiriyle uyumu en iyi olan iki cihaz Sirius ile Corvis idi. Sonuç: Üç cihazında MKK değerlendirilmesinde tekrarlanabilirliklerinin çok iyi olduğu görüldü. Sirius ile Corvis’in birbiriyle uyumu daha iyiydi. Bu nedenle MKK değerlendirilmesinde günlük pratikte birbirinin yerine kullanılabilirler. MKK değerlendirilmesinde OKT’deki ölçümler diğer cihazlara göre daha ince olduğu için MKK ölçümündeki küçük değişimlerin kritik olduğu durumlarda OKT’nin de günlük pratikte kullanılması faydalıdır.

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Cite This Article

KÖŞKER, M., ÇALIŞKAN, S., ÇELİKAY, O., DOĞAN, A. Ş., KAYA, A., GÜRDAL, C. (2018). Assesment of Central Corneal Thickness Using Corneal Dynamic Scheimpflug Analyzer Corvis ST, Sirius Kombine Scheimpflug-Placido Disk System and RTVue Anterior Segment Optical Coherence Tomography in Normal Eyes. Van Tıp Dergisi, Cilt: 25 - Sayı: 3, 381–385. https://ajindex.com/articles/334795

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