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I see these 'bugs' on my laptop screen from time to time. Maybe once a week at least.
The black dot at the top is actually a dead pixel, thanks apple!
I have calculated the size of them, seeing that they take up 2 pixels and are all about this size, never bigger. They seem to be about 50micrometers (1/20th of 1mm) in lengh.
They seem to move constantly, but very slowly, maybe 1cm every 5 secons or so, this is the only reason I see them, always think they're a dead pixel or a bit of dust at first!
Any info on getting rid of them or if they are harmful would be greatly appreciated too.
Thanks in advance.