Journals / MN Oftalmoloji / 2000 / Cilt: 7 - Sayı: 2

A new risk factor for pterygium: Stepness of cornea

Pterjium gelişimi için yeni bir risk faktörü: Kornea dikliği

Pages
138–142
DOI
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AI Summary & Key Takeaways

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

We think that corneal stepness may be a risk factor for development of pterygium.

📌 3 Key Takeaways

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Objective & Hypothesis:PURPOSE: We aimed to determine topographic features of cornea with pterygium to clarify etiopathogenesis of pterygium.
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Key Findings & Data:METHODS: We evaluated corneal topography in patients with pterygium using computed corneal topography system. 98 eyes of 53 consecutive patients who had primary pterygium were enrolled in the study.
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Conclusion & Impact:We think that corneal stepness may be a risk factor for development of pterygium.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Risk faktörleri · Pterjium · Göz anomalileri

Abstract

PURPOSE: We aimed to determine topographic features of cornea with pterygium to clarify etiopathogenesis of pterygium. METHODS: We evaluated corneal topography in patients with pterygium using computed corneal topography system. 98 eyes of 53 consecutive patients who had primary pterygium were enrolled in the study. For control purposes, corneal topographic measurements of 80 eyes of 40 volunteers who were not operated on were taken. Pterygia were divided into three groups regarding horizontal pterygium size. RESULTS: The mean pterygium size in the group 1, group 2 and group 3 were found 0.92 ± 0.42mm, 2.15 ± 0.29mm and 3.79 ± 0.68mm respectively. The mean refractive corneal powers were found 40.69 ± 0.42 D (39.56-41.32) (8.30mm) in the control group, 42.39 ± 0.78 D (40.67-50.52) (7.96mm) in group 1, 42.40 ± 0.67 D (40.71-43.34) (7.96mm) in the group 2, 41.92 ± 0.63 D (40.58-43.18) (8.05mm). Corneas with pterygium were found steeper than normal corneas. The steepest part of corneas stretched centrally from superior to inferior at the vertical axis in all pterygium cases. The flattest part of corneas were located in the nasal quadrant which is corresponding to place of pterygium. Corneas with pterygium were significantly steeper than normal corneas even in very small sizes of pterygium. CONCLUSIONS: Corneas with pterygium were significantly steeper than normal corneas. Pterygia affected whole cornea and changed corneal topography. Cornea was flattened by pterygium. We think that corneal stepness may be a risk factor for development of pterygium.

Özet

AMAÇ: Pterjiumlu korneaların topografik özelliklerini incelemek YÖNTEM: Çalışmada bilgisayarlı kornea topografisi sistemi kullanılarak kornea topografileri değerlendirilmiştir. Çalışmaya 53 hastanın primer pterjiumlu 98 gözü alınmıştır. Kontrol grubu olarakta 40 normal olgunun 80 gözü değerlendirilmiştir. Pterjium olguları horizontal boyuna göre üç farklı gruba bölünerek incelenmiştir. BULGULAR: Ortalama pterjium boyu 1. grupta 0.92 ± 0.42mm, 2.grupta 2.15 ± 0.29mm ve 3. grupta 3.79 ± 0.68mm olarak bulundu. Tüm yüzeyin ortalama korneal kırıcılığı kontrol grubunda 40.69 ± 0.42 D, 1,grupta 42.39 ± 0.78 D, 2.grupta 42.40 ± 0.67 D ve 3. grupta da 41.92 ± 0.63 D olarak tespit edildi. Tüm pterjium olgularında korneanın en dik kısmını orta hatta, yukarıdan aşağıya doğru uzanan bir bölge oluşturmaktaydı. Pterjiumlu kornealar çok küçük boyutlu pterjiumlarda bile normal kornealardan anlamlı derecede daha dik ve kırıcı olarak bulundu. SONUÇ: Pterjium gelişen korneaların normal kornealara göre daha kırıcı ve daha dik olduğu gözlendi. Pterjium gelişimi tüm korneayı etkileyerek kornea topografisini değiştirmekte ve daha düz hale getirmektedir. Bu sonuçlar bizi kornea dikliğinin pterjium gelişimi için bir risk faktörü olabileceği düşüncesine ulaştırmıştır.

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Cite This Article

ÇİNAL, A., YAŞAR, T., DEMİROK, A., TOPUZ, H., ÖZDEMİR, A. M. (2000). A new risk factor for pterygium: Stepness of cornea. MN Oftalmoloji, Cilt: 7 - Sayı: 2, 138–142. https://ajindex.com/articles/296421

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