Comparison of Biometric Parameters and the Level of Agreement Between OB820 and Iol Master

Objective: The primary aim of this study was measure and compare the axial length (AXL), keratometric indices (K1, K2) anterior chamber depth (ACD) by biometric devices; IOL Master OB 820, to seek evidence on level agreement for these parameters between two devices.
 Study Design: Quasi-experimental study.
 Place Duration Study: Armed Forces Institute Ophthalmology, Rawalpindi Pakistan, from Jul 2016 Apr 2018.
 Methodology: This carried out at Forced Ophthalmology seventy eyes 53 patients with senile grade II III cataract. All underwent comprehensive ophthalmic examination using different optical biometry devices IOL-Master (Carl Zeiss Meditec, Jena, Germany) OB-820 (Wave Light, Germany). Parameters were kera metric (ACD). results evaluated Bland–Altman analyses (LoA). differences both methodologies assessed paired samples t test, their correlation intra class coefficient (ICC).
 Results: mean age 62.97 ± 7.97 years male/female ratio 28/25. Mean OB820 differed significantly in groups, a p-value 0.018. Bland-Altman analysis further confirm significant difference range 95% limits ICC=0.659) AXL. While, other parameters, K1, K2 ACD showed an outstanding (range within confidence interval Bland -Altman analysis) internal consistency and.................