After cataract surgery, there are always some epithelial cells remaining in the crystalline lens within the capsular bag despite exhaustive polishing which is done in an attempt to leave it more transparent at the end of the surgical procedure. Over time, these cells multiply and migrate towards the posterior capsule causing the opacification thereof. On the other hand, the design of certain intraocular lenses may influence the migration of the epithelial cells inside the capsular bag, which is why we must take this detail into account when it comes to choosing the intraocular lens model to be implanted.