Tarkan MUMCUOĞLU, Kemal ÖZÜLKEN, Kemal TEKİN, Çağrı İLHAN, Mahmut KAYA

Benzer Kırma Kusuru İçin Uygulanan Farklı Keratorefraktif Cerrahi Yöntemlerinin Keratometrik Değerler Üzerine Etkileri

keratorefraktif yöntemlerle düzeltilen benzer büyüklükteki miyopik ve birleşik miyop astigmatik kırma kusurunun, korneal keratometrik güç üzerindeki etkilerinin benzer olup olmadığının araştırılmasıdır. Gereç ve Yöntemler: Bu geriye dönük, randomize olmayan, karşılaştırmalı klinik araştırma Ocak 2018 ve Haziran 2019 tarihleri arasında gerçekleştirilmiştir. Uygulanan cerrahiye göre olgular PRK (n=100) ve LASIK (n=76) olarak 2 gruba ayrılmıştır ve her bir hastanın sağ gözü çalışmaya dahil edilmiştir. Olguların cerrahi öncesi ve cerrahi sonrası 6. aydaki klinik verileri göz önünde bulundurularak sferik eşdeğerindeki (SE) azalma ile SEfark ve ortalama keratometrideki (Km) değişim ile Kfark değerleri hesaplanmıştır. Kfark/SEfark hesaplaması ile birim SE değişiminin Km üzerindeki etkileri araştırılmış ve gruplar arasında karşılaştırma yapılmıştır. Bulgular: PRK ve LASIK grupları arasında cinsiyet (p=0,348) ve yaş (p=0,768) bakımından anlamlı fark yoktu. SEfark değeri PRK grubunda -3,36 ± 1,46 D (-0,88 ile -6,50 D) iken LASIK grubunda -3,26 ± 1,41 D (-1 ile -6,13 D) idi ve gruplar arasında anlamlı fark yoktu (p=0,206). Kfark/SEfark parametresi PRK grubunda -0,87 ± 0,23 (-0,23 ile -1,53) iken LASIK grubunda -0,94 ± 0,46 (-0,32 ile -1,29) idi ve gruplar arasında anlamlı fark yoktu (p=0,169). Sonuç: Benzer büyüklükteki miyopik veya birleşik miyop astigmatik kırma kusuru düzeltmesinde uygulanan PRK ve LASIK cerrahilerinin Km değerindeki cerrahi ile elde edilen değişim üzerine olan etkileri benzerdir.

Anahtar Kelimeler:

Keratometri, LASIK, PRK, Refraktif cerrahi, Sferik eşdeğer

The Effects of Different Keratorefractive Surgical Methods Performed for Similar Refractive Errors on Keratometric Values

Objective: To investigate whether the effects of myopic and compound myopic astigmatic refractive errors with similar magnitude corrected by different keratorefractive methods like photorefractive keratectomy (PRK) and laser in-situ keratomileusis (LASIK) on corneal keratometric power are similar. Material and Methods: This retrospective, non-randomized, comparative study was conducted between January 2018 and June 2019. The subjects were separated within two groups as PRK (n=100) and LASIK (n=76) according to performed surgery, and only right eyes of each subjects were included in this study. Considering preoperative and postoperative sixth month clinical values, spherical equivalent (SE) difference (SEdif) and mean keratometry (Km) difference (Kdif) values were calculated. The effects of per each SE change on Km were investigated via calculation of SEdif/Kdif, and the groups were compared. Results: There was no significant difference between PRK and LASIK groups in terms of gender (p=0.348) and age (p=0.768). SEdif values were 3.36 ± 1.46 D (-0.88 to -6.50 D) in PRK group and -3.26 ± 1.41 D (-1 to -6.13 D) in LASIK group, and there was no significant difference between groups (p=0.206). Kdif/SEdif calculation was -0.87 + 0.23 (-0.23 to -1.53) in PRK group and -0.94 + 0.46 (-0.32 to -1.29) in LASIK group, and there was no significant difference between groups (p=0.169). Conclusion: The effects of PRK and LASIK surgeries performed to correct myopic and compound myopic astigmatic refractive errors with similar magnitude, on change in Km value because of surgery, are similar.

Keywords:

Keratometry, LASIK, PRK, Refractive surgery, Spherical equivalent,

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