Sometimes with newfs the bottom eyelid can turn in on the eye and hairs that should be on the outside face in towards the eye causing irritation. This might be the cause, if it is, their eyes can also be a bit runny. When Bell started with it as a puppy I would pull the skin down below the eye at every opportunity to stop the irritation and hopefully to train the muscles below the eye. It didn't work. At 18months she had to visit the vets for a face lift, they cut a small section of skin beneath each eye and pulled it tighter before sewing the cut so the bottom eyelid was in the right position. You can no longer see the scars and wouldn't know she had had it done.
18 months of age seemed a good age to me to do it as she was near on full grown so the condition was unlikely to go away and I combined the op with getting her hip scored so there was only one lot of anaesthetic.
If it was my dog I wouldnt be overly worried at this point, I would wait and see if it would clear up and possibly pull the skin down below the eye to see if the lid turns out. However if there were signs of distress present, rubbing the eye against the carpet or furniture or trying to paw the eye, or excessive runniness then it would be off to the vets straight away. if not, from a home remedy point of view I would visit the pharmacy and get saline eye drops that us humans use for dry eyes and try that, as if it is only a small scratch on the eye that will heal, it will lubricate the eye and the saline will keep it clean. But remember at the end of the day it is your call, if you are really worried seek reassurance from the vet.