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Why is Optical Alignment critical for Multi-focal IOLs?

Knowing and understanding a patient's Angle Alpha gives confidence in recommeding this premium option

The Angle Alpha can be considered a confidence metric because knowing this number helps the surgeon predict how well the MIOL will align optically with the patient's visual axis. A large Angle Alpha, the distance and direction between the visual axis and the limbal center, can indicate that the MIOL will not center ideally with the visual axis. Additional information on this topic can be found in an article from Cataract and Refractive Surgery Today by iTrace user Asim Piracha, M.D.: Using Angle Alpha in Premium IOL Screening.