Objectives: This study was done to evaluate and compare PCI and AUS measured axial lengths and accuracy of IOL power calculation using UBII IOL power calculation formula. Methods: patients undergoing cataract surgery underwent ocular biometry and IOL power calculation using PCI and AUS using Universal Barrett II formula. The subjects were randomized into 2 groups PCI and AUS respectively to receive the IOL power accordingly. The post op refractive spherical equivalent was evaluated and the groups were compared using residual refractive error and absolute residual refractive error at 6 weeks post-op.Comparison of axial length, IOL power between the two groups was done using the Bland-Altman plot and the agreement between the predicted refraction and the final refraction in both groups was compared using paired student-T test or Mann-Whitney test. Results: Total 119 subjects were analyzed with 61 and 58 subjects in the Group PCI and AUS respectively. The two groups (PCI and AUS) comparable with reports to age, gender and laterality. The average axial length, predicted IOL power, residual refractive error and absolute residual refractive errors were statistically similar between both the groups. Conclusions: The PCI and AUS are similarin measuring ocular axial length and can be used interchangeably with UBII formula for reasonable post cataract surgery refractive accuracy.