Verion image guided system: Study on expected refraction and keratometry

Abstract

Method: A retrospective study was conducted at Rotary eye institute, Navsari, All patients who were diagnosed with cataract was included in the study. In each patient comprehensive eye examination was performed pre and post operatively objective refraction and keratometry reading was recorded. Their keratometry readings was compared. The objective refraction post operatively and verion expected refraction was compared with verion image guided system and Topcon autokeratorefractometer. Result: Out of 63 patient’s eyes, 39(61.9%) were female’s eye & 24 (38.1%) were male’s eye. A pair t – test was performed between veion expected spherical, cylinder and cylinder axis and post op AR spherical, cylinder and cylinder axis. There was no significant difference between verion expected spherical, cylinder and cylinder axis and post op AR spherical, cylinder and cylinder axis (M= -0.13, SD=0.12 ) and (M= -0.23,SD=0.49), p = 0.104, (M= - 0.75, SD=0.46 ) and (M=-0.80,SD=0.56), p = 0.308, (M= 88.71, SD=36.47) and (M= 88.89,SD=40.81), p = 0.981.Strong linear correlation was observed between IOL master K1 and verion K1, IOL master K2 and verion K2 and mean IOL master K and mean verion K, Pearson correlation =.97, ρ <.01. Pearson correlation =.96, ρ <.01, Pearson correlation =.97, ρ <.01 Conclusion: -The verion image guided system is the new technology to give reliable expected refractive outcome. The verion image guided system and IOL Master together can be used for achieving near emmetropia post operatively.