This will be a retrospective case study. The data collected will include patient demographics, preoperative refractive data, keratometry, type of intraocular lens, follow-up duration, surgical information, complications, postoperative visual and refractive outcomes. Residents will be surveyed regarding their preoperative planning, use of intraocular lens calculators, and intraocular lens considerations. Main outcome measures will include refractive and surgical outcomes at the 1 week and 1 month post-operative visits. Analysis will also be performed comparing different intraocular lens calculators and their predictive error and accuracy within 0.5D.