02/11/2025
Flashes and Glare After a Cataract Operation
By Justin K Ng'andwe. COOi
What is it?
After a cataract operation, some people notice flashes, streaks, or rings of light around lamps, car headlights, or bright objects. This is called positive dysphotopsia — but simply put, it means seeing extra light effects after getting your artificial lens.
Why does it happen?
The artificial lens placed in your eye can sometimes bend or reflect light in unusual ways.
This happens when:
Light bounces off the edges of the lens
The lens reflects light inside your eye, creating glare or ghost-like images
You’re more likely to notice this if:
Your lens has sharp edges
Your replacement lens has a strong prescription
You’re in dim light (your pupils open wider and let in more light)
Will it go away?
In most cases, yes. These light effects usually fade as your brain gets used to your new vision. This adjustment process is called neuroadaptation, and it can take a few weeks to months.
When should you be concerned?
See your eye doctor immediately if:
The flashes appear suddenly
They don’t go away
You also see new floaters (small moving spots) or dark shadows
These could be signs of a retinal problem, which needs urgent attention.
Interesting fact:
A little cloudiness behind your artificial lens (called posterior capsule opacity) can actually make these light effects less noticeable — almost like a natural filter reducing the glare.
Bottom line:
Flashes or glare after a cataract operation are common and usually harmless. They often get better on their own, but if anything changes suddenly or feels unusual, don’t hesitate to contact your eye specialist.
