Journals / Türk Oftalmoloji Dergisi / 2009 / Cilt: 39 - Sayı: 3

How does ablation decentration effect postoperative high order aberrations after myopic PRK?

Miyopi için yapılan PRK operasyonlarında desantralizasyon postoperatif yüksek sıralı aberasyonları nasıl etkilemektedir?

Pages
189–196
Publication Date
2022-11-05
DOI
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AI Summary & Key Takeaways

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

It seems that decentration does not have a significant effect on other types of postoperative high order aberrations.

📌 3 Key Takeaways

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Objective & Hypothesis:PURPOSE: To determine effect of ablation decentration on postoperative high order aberrations after PRK operations.
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Key Findings & Data:MATERIAL-METHOD: Medical records of 378 cases underwent refractive surgery with PRK were studied retrospectively.
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Conclusion & Impact:It seems that decentration does not have a significant effect on other types of postoperative high order aberrations.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

PURPOSE: To determine effect of ablation decentration on postoperative high order aberrations after PRK operations. MATERIAL-METHOD: Medical records of 378 cases underwent refractive surgery with PRK were studied retrospectively. Postoperative ablation decentration was calculated with comparision of preoperative and postoperative corneal topography images. Total wavefront aberrations were measured preoperatively and postoperatively. Difference between preoperative and postoperative wavefront aberrations were compared. Correlation among magnitude of ablation decentration and high order aberrations were studied. RESULTS: Mean high order RMS was 0.42±0.05 µ preoperatively and 0.33±0.02 µ postoperatively and mean postoperative high order RMS was significanly lower than postoperative RMS (p=0.001). Mean decentarion magnitude was 0.25±0.01mm. Mean postoperative values of high order aberrations was 0.150±0.03 µ for vertical coma, -0.090±0.03 µ for horizontal coma, 0.024±0.03 µ for negative trifoil, -0.068±0.03 µ for positive tirfoil, and -0.083±0.03 µ for spherical aberrations. Magnitude of decentration did not correlated significantly with postoperative high order aberrations except spherical aberration. (r=0.20 and p=0.001) CONCLUSION: There was only a significant correlation between magnitude of postoperative decentration and postoperative spherical aberration. It seems that decentration does not have a significant effect on other types of postoperative high order aberrations.

Özet

AMAÇ: Fotorefraktif keratektomi (PRK) yapılmış olgularda, ablasyon desantralizasyonunun postoperatif yüksek sıralı aberasyonlara etkisini incelemek. GEREÇ-YÖNTEM: PRK cerrahisi uygulanan 378 hastanın kayıtları retrospektif olarak incelendi. Olgulara ait preoperatif ve postoperatif korneal topografi görüntüleri karşılaştırılarak ablasyon desantralizasyonu hesaplandı. Olguların preoperatif ve postoperatif total wavefront aberasyonları ölçülerek, wavefront aberasyonlarındaki değişim incelendi. Ablasyon desantralizasyonunun büyüklüğü ile yüksek sıralı aberasyonlar arasındaki ilişki, korelasyon analizi ile incelendi. BULGULAR: Preoperatif ortalama yüksek sıralı RMS değeri 0.42±0.05 µm ve postoperatif ortalama yüksek sıralı RMS değeri 0.33±0.02 µm olarak ölçüldü. Ortalama postoperatif yüksek sıralı RMS değerleri ile ortalama preoperatif yüksek sıralı RMS değerleri arasında istatistiksel olarak anlamlı bir fark izlendi.(p=0.001) Ortalama desantralizasyon büyüklüğü 0.25±0.01mm idi. Ortalama postoperatif yüksek sıralı aberasyonlar: Vertikal koma 0.150±0.03 µm, horizontal koma -0.090±0.03 µ, negatif trifoil 0.024±0.03 µm, pozitif trifoil -0.068±0.03 µm ve sferik aberasyon -0.083±0.03 µm idi. Desantralizasyonun büyüklüğü ile postoperatif yüksek sıralı aberasyonlar arasındaki ilişki regresyon analizi ile incelendiğinde sadece sferik aberasyon ile desantralizasyon arasında istatistiksel olarak anlamlı bir bağlantı bulundu. (r=0.20 ve p=0.001) SONUÇ: Postoperatif desantralizasyonun büyüklüğü ile postoperatif sferik aberasyon arasında belirgin bir korelasyon bulunmuştur. Desantralizasyonun postoperatif yüksek sıralı aberasyonlar üzerine sferik aberasyon dışında, belirgin bir etkisi yoktur.

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Cite This Article

BAYHAN, S., ÇAKMAK, H. B., ŞİMŞEK, Ş., SİMAVLI, H., DAL, D., ÇAĞIL, N. (2022). How does ablation decentration effect postoperative high order aberrations after myopic PRK?. Türk Oftalmoloji Dergisi, Cilt: 39 - Sayı: 3, 189–196. https://ajindex.com/articles/638526

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