Originally Posted by Mark Smith:
“Sometimes you can get rid of them by pressing quite hard on the affected area of the screen, but be careful! I once had a red pixels stuck on my TV screen and I was able to get rid of it this way but it would eventually come back. I haven't noticed it for a while though, seems to come and go.
Just google stuck pixels or dead pixels, again be careful not to cause more serious damage to your screen. Apple can otherwise replace the device but it will cost you dear, and even if it had still been in warranty it's unlikely they would replace it with just a single defective pixel, usually it's a set number depending on device type and screen resolution.
Or just put up with it, if it's near the edge surely it's not so noticeable?”
I probably wouldn't do this because unlike an LCD TV there is a layer of glass (digitizer) above the LCD. Pushing too hard on this risks breaking it (but it probably would require a really hard push to even slightly damage it). It also makes it difficult to apply pressure where necessary.
If it's green that doesn't suggest a dead pixel. IPS LCDs which the iPad has default to black when dead. It's possibly dust under the glass or a stuck pixel which can be remedied with an app that flashes primary colours on the screen in a fast sequence, or it may just eventually fix itself. How old is the iPad?
Try turning the screen off and see if you can see any dust particles. Change the background colour and see if the 'green' dot changes colour.