Investigation of the relationship amongst refraction, keratometric and pachymetric measurements

Kırma kusurları, keratometrik ve pakimetrik değerler arasında ilişki varlığının araştırılması

Abstract

PURPOSE: To investigate the relationship amongst refraction, central corneal thickness (CCT) and keratometric measurements.Setting: Beyoglu Eye Education and Research Hospital, Istanbul METHODS: A retrospective study of the subjective refraction of 1022 eyes of 511 consecutive subjects who presented for refractive surgery evaluation was performed. Of the subjects, 241(48%) were male and 270(52%) were female. Mean age of male and female were 32.1±9 and 30.1±8.1 respectively. Javal Keratometer was used for keratometric measurements. CCT was obtained with DGH 4000B A-Scan/Pachymeter. The statistical forecasting methods used are Mann-Whitney U-test, Spearman Correlation, Wilcoxon signed rank test, Kruskal-Wallis methods as implemented in the software package SPSS version 11.5. A p-value of +5.00 Diopter(D)(p=0.04), and keratometric values were higher in the eyes those less than -6.00 D(p=0.0001).CONCLUSIONS: Males had lower keratometric measurements and were more likely to be hyperopic or mix hyperopic astigmatism than female. Females were more mix myopic astigmatism than males. CCT was higher in high hyperops and low in high myopes. A negative linear correlation between the keratometric measurements and SE was found. We believe that, investigation of these parameters would be helpful in better understanding of the biometric characteristics of the eye and choosing the appropriate technique in refractive surgery.

Özet

AMAÇ: Kırma kusurları, keratometrik ve pakimetrik değerler arasında ilişki varlığını araştırmak.Yer: Beyoğlu Göz Egitim ve Araştırma HastanesiGereç ve YÖNTEMLER: Kırma kusuru olup refraktif cerrahi olmak üzere Beyoğlu Göz Eğitim ve Araştırma Hastanesine başvuran 241 (%48) erkek hastanın 482 gözü ve 270 (%52) kadın hastanın 540 gözü (toplam 1022 göz) geriye dönük olarak incelendi. Erkek ve kadın hastaların ortalama yaşı sırasıyla, 32,1±9 ve 30,1±8,1 idi. Keratometrik ölçümler Javal Keratometresi ile, pakimetrik ölçümler ise DGH 4000B A-Scan/Pachymeter cihazı ile yapıldı. Kırma kusurları subjektif olarak belirlendi. Verilerin analizi SPSS 11.5 paket programında Mann Whitney U, Kruskal-Wallis, Spearman Korelasyon ve Wilcoxon İşaret testleriyle değerlendirildi. P