Role of angle κ in visual quality in patients with a trifocal diffractive intraocular lens

The patients' postoperative far, intermediate, and near vision was not affected by their angle κ. However, when angle κ was greater than 0.4 mm, the incidence of glare and halo increased and when it was greater than 0.5 mm, patients' visual quality decreased. In clinical work, for patients with a larger angle κ, the choice to implant a trifocal IOL should be carefully evaluated.