Halomtr is an app designed for Cataract and Refractive Lens Implant Surgeons that demonstrates to patients the potential visual side effects of various types of lens implant. Halomtr can be used during pre-op consults to educate patients. Moreover, patients can give you feedback on their post-op experience as they can interactively edit their perceived halos, glare, and starbursts. This interactive feature will allow clinicians to compare the visual satisfaction of their patients with various types of IOLs.