الفهرس 
Evaluation of different techniques of measurement of the axial length in silicone oil filled eyes
CONTENTSOnly 14 pages are availabe for public view
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Abstract
Aim: The current study was performed to compare some of the current different techniques of axial length measurement in silicone oil filled eyes, and comparing the results of each with the original axial length measured before pars plana vitrectomy and silicone oil injection, for a better IOL calculation and better visual outcome. methods: The axial length was measured before pars plana vitrectomy and silicone oil injection by A-scan biometry. After the operation the axial length was measured using A-scan biometry normal velocity (1548 m/sec) and multiplying the result by 0.71, A-scan biometry with a velocity of 1000 m/sec, A-scan biometry of the other eye, optical biometry using the standard program and optical biometry using a specialized program for silicone oil filled eyes.The results were compared and correlated to the pre-operative axial length to detect which of the postoperative techniques has the strongest correlation with it. results: The method with the highest correlation coefficient was optical biometry using the standard program being 0.948, followed by optical biometry using silicone-specialized program with a coefficient of 0.941, then A-scan biometry multipled by correcting factor with a coefficient of 0.940, and A-scan biometry with a coefficient of 0.938, and finally A-scan biometry using the slower velocity with a coefficient of 0.888. All the results were clinically significant (p value < 0.001)