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Is the half circle on the outside half of your vision? How long ago was your surgery? How is your vision otherwise? Any floaters?
It is not uncommon. We usually make the incision in the cornea on the outside part of your eye. At first, the incision is rough and jagged and white. Then over time it softens and becomes translucent with the cornea tissue. This may take several weeks to even months, but you will stop seeing it. Not everyone may have this effect.
The other thing is to make sure that there is no bleeding or retinal detachment in the back (but your surgeon would be able to pick that up).
Hope this helps and thank you.
You are welcome. It's usually not the edge of the lens.