TY - JOUR T1 - Pterjiumda Topografik Keratokonus İndekslerinin İncelenmesi TT - Examination of Topographic Keratoconus Indices in Pterygium AU - Sağlık, Ayhan PY - 2025 DA - September Y2 - 2025 DO - 10.35440/hutfd.1730409 JF - Harran Üniversitesi Tıp Fakültesi Dergisi PB - Harran Üniversitesi WT - DergiPark SN - 1304-9623 SP - 473 EP - 477 VL - 22 IS - 3 LA - tr AB - Amaç: Pterjiumlu gözlerde topografik keratokonus indekslerindeki değişiklikleri değerlendirmek ve pterjiumun kornea morfolojisi üzerindeki etkisini ortaya koymaktır.Materyal ve metod: Pterjium tanısı konulan 78 hastanın tek gözü çalışmaya dahil edildi. En iyi düzeltilmiş görme keskinliği ve biyomikroskopik muayene yapıldı. Hastalar pterjium evresine göre üç farklı gruba ayrıldılar. Scheimpflug tabanlı kornea topografisi kullanılarak, K1, K2, Km, Kmax, ISV, IVA, KI, CKI, IHA, IHD, Rmin, KISA% ve IS gibi parametreler kaydedildi ve istatistiksel olarak değerlendirildi.Bulgular: Hastaların yaş ortalaması 45,48 ± 14,17 yıldı. Keratokonus indekslerinin çoğu normal sınırlar içinde kaldı; ancak ISV (35,07 ± 31,85), IHA (8,49 ± 11,02) ve KISA% (22,24 ± 25,49) geniş bir aralık gösterdi. pterjium evresi arttıkça yaş ve astigmatizma (p=0.03, p<0.001) ve görme düzeyi azalmaktadır (p<0.001). Ortalama keratokmetri değerindeki değişim ve en ince kornea kalınlığındaki azalma anlamlı değildi. Evre 3 pterjiumda, ISV, IHA, IHD, Rmin, KISA, indekslerinde anlamlı artış saptanırken, IVA, IS, KI de anlamlı azalma saptandı.Sonuç: Pterjium ektatik değişikliklere neden olmasa da, belirli keratokonus endekslerinde yansıyan önemli lokal kornea yüzey düzensizliklerine yol açabilir. Kantitatif topografik analiz, pterjiumun görsel etkisinin anlaşılmasına ve cerrahi planlamaya rehberlik etmeye yardımcı olabilir. KW - Pterjiyum KW - keratokonus indeksleri KW - korneal topografi KW - keratometri N2 - Background: This study aimed to evaluate alterations in topographic keratoconus indices in eyes with pterygium and to assess the effect of pterygium on corneal morphology.Materials and Methods: A total of 78 eyes from patients diagnosed with pterygium were included in this study. Best-corrected visual acuity (BCVA) and slit-lamp biomicroscopy were performed. Patients were categorized into three groups according to the stage of pterygium. Scheimpflug-based corneal tomogra-phy was used to assess the following parameters: K1, K2, Km, Kmax, ISV, IVA, KI, CKI, IHA, IHD, Rmin, KISA%, and IS. All data were statistically analyzed.Results: The mean age of the patients was 45.48 ± 14.17 years. While most keratoconus indices re-mained within normal limits, ISV (35.07 ± 31.85), IHA (8.49 ± 11.02), and KISA% (22.24 ± 25.49) demon-strated considerable variability. With advancing pterygium stage, both age and refractive astigmatism increased (p = 0.03, p < 0.001), whereas BCVA significantly decreased (p < 0.001). Changes in mean keratometry and minimum corneal thickness were not statistically significant. In stage 3 pterygium, ISV, IHA, IHD, Rmin, and KISA% significantly increased, while IVA, IS, and KI significantly decreased.Conclusions: Although pterygium does not induce true ectatic changes, it may cause localized corneal surface irregularities that are reflected in certain keratoconus indices. Quantitative topographic assess-ment can enhance our understanding of the visual impact of pterygium and assist in preoperative plan-ning. CR - 1. Shahraki T, Arabi A, Feizi S. Pterygium: an update on patho-physiology, clinical features, and management. Therapeutic Advances in Ophthalmology. 2021;13:25158414211020152. CR - 2. Lu M, Ren H, Deng X, Yang K, Zhang H, Yang W, et al. Review of the Frequent Occurrence of Pterygium on the Nasal Side. Journal of Current Ophthalmology. 2024;36(3):223-8. CR - 3. Yoon CH, Seol BR, Choi HJ. Effect of pterygium on corneal astigmatism, irregularity and higher-order aberrations: a com-parative study with normal fellow eyes. Scientific Reports. 2023;13(1):7328. CR - 4. Koç M, Yavrum F, Uzel MM, Aydemir E, Özülken K, Yılmazbaş P, editors. The effect of pterygium and pterygium surgery on corneal biomechanics. Seminars in Ophthalmology; 2018: Tay-lor & Francis. CR - 5. Gharieb HM, Othman IS, Oreaba AH, Abdelatif MK. Topograph-ic, elevation, and keratoconus indices for diagnosis of kerato-conus by a combined Placido and Scheimpflug topography sys-tem. European journal of ophthalmology. 2021;31(4):1553-62. CR - 6. Herber R, Lenk J, Ramm L, Wittig D, Patzner MM, Pillunat LE, et al. Evaluation of indices for the assessment and classifica-tion of keratoconus based on optical coherence tomography and Scheimpflug technology. Ophthalmic and Physiological Optics. 2025;45(2):391-404. CR - 7. Salman A, Darwish T, Ali A, Ghabra M, Shaaban R. Sensitivity and specificity of Sirius indices in diagnosis of keratoconus and suspect keratoconus. European Journal of Ophthalmology. 2022;32(2):790-7. CR - 8. Welson N, Samy M, Gaafar A, Badran T. The Effect of Pterygium Surgery on Corneal Topography. QJM: An International Journal of Medicine. 2020;113. CR - 9. Whelan AD, Pollmann AS, Lewis DR. Prevalence of mislabelled methods among case‐control and cohort studies in the oph-thalmology literature. Clinical & Experimental Ophthalmology. 2021;49(3). CR - 10. Mohammad-Salih PA, Sharif AFM. Analysis of pterygium size and induced corneal astigmatism. Cornea. 2008;27(4):434-8. UR - https://doi.org/10.35440/hutfd.1730409 L1 - https://dergipark.org.tr/tr/download/article-file/5004813 ER -