If you've read anything about premium lenses, you've seen the word halos. It's the single most common worry we hear, and it's a fair one. Here's the honest picture: what causes night-vision side effects, how often they fade, and the kind of patient who should weigh them most carefully.
What halos and glare actually are
Premium multifocal and trifocal lenses split light to give you more than one focal distance. That's how they free you from glasses, but splitting light can also create rings (halos) or streaks (starbursts) around bright points at night, like oncoming headlights. The optical name for this is dysphotopsia.
It's most noticeable in the dark, against a bright light, in the first weeks after surgery. In good lighting, most people never notice anything.
Neuroadaptation: why most people stop noticing
Your brain is remarkably good at learning to ignore visual noise it decides isn't important. Over a few weeks to about three months, most patients neuroadapt, the halos don't necessarily disappear, but the brain stops flagging them, and they fade into the background of normal vision.
Honesty matters here: a smaller number of people stay aware of them longer, and a few never fully tune them out. That's why candidate selection, and lens choice, matters so much.
Lens choice changes the odds
Not all premium lenses behave the same at night. Extended-depth-of-focus (EDOF) lenses generally produce fewer night-vision artifacts than trifocals, at the cost of a slightly weaker reading range. Light-adjustable lenses let us fine-tune your vision after surgery based on how you actually see. Part of the consultation is matching the lens to how much you drive at night.
It's also exactly why our founder co-founded VirtuaLens, our VR lens preview: you can experience night driving through each lens before you choose, so the trade-off is something you've seen, not something you're told about afterward.
Who should think twice
Two kinds of patients should weigh this most carefully. The heavy night driver, because that's when artifacts show up, and the self-described perfectionist, because research consistently finds that patients with very exacting visual standards are more likely to stay bothered by minor effects, even with excellent 20/20 vision.
Neither is a hard no. But if that's you, you deserve a frank conversation about the trade-offs before surgery, not reassurance that glosses over them. That conversation is the whole point of how we work.
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Quick answers
For most people they fade into the background within a few weeks to about three months as the brain neuroadapts. A minority stay aware of them longer. We'll tell you honestly where you're likely to land.
EDOF lenses generally produce fewer halos than trifocals, trading a bit of reading range. The right choice depends on how much you drive at night, which is part of what we figure out together.
Yes. Our VR lens preview lets you experience night driving through each lens option before you commit.