Glares and Halos
Another side effect that patients need to be aware of with multifocal lens implants is glare and halos around lights at night time. If you haven’t told the patient about this beforehand, they will tell you very quickly because it’s quite a spectacular phenomenon. At night time for the first day or two after having these lens implants put in. When you look at a light, a car headlight or a streetlight, it’ll have a series of rings around it. And what you’re seeing is the different focal points of the lens.
Now, what happens is it takes a few days, sometimes it can take up to a few months, but the brain learns to use the focus of the lens and learns that these rings around lights are different focal points and you don’t see them all at once. That’s called neuroadaptation, and it’s well known and well understood. Eventually, these glares and halos around lights reduce to such a small level that they’re barely imperceptible.
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