Patients often experience halos for a few days after cataract surgery with toriclens and monofocal lens implants. In some cases the effect takes weeks to disappear, according to Marin Eyes. Patients with multifocal lens implants may see halos, but they usually disappear a day or two after the surgery.
A halo is an arc of light in a person's periphery vision, states Marin Eyes. Multifocal lens implant recipients generally see halos at night more often than those receiving monofocal focus lenses. The edges of implanted cataract lenses are specially treated to reduce the possible recurrence of pre-surgery symptoms; the treated edges frequently produce halos. If the condition becomes permanent, which is rare, the patient can wear anti-reflective glasses to minimize the halo effect.