Things stuck in the eye/in the tissues surrounding the eye do need careful removal and there are times a vet needs to remove it.
But first of all, it is worth flushing the eye. Two methods you can try:
- Cotton pad (not cotton wool) soaked in cooled boiled water, slowly squeeze the cotton pad above the top corner of the eye so the water flushes the surface of the eye.
or
- 1ml syringe (needleless, obviously), filled with cooled boiled water and steadily dripped above the top corner of the eye, so the water flushes the surface.
If two or three short rounds of flushing prove unsuccessful, what you do next depends on what is stuck. A hay seed/husk tends to be more likely to need removing by an expert hand as it tends to pierce the tissues more. A wisp of hay does not stick as sharply into the tissues (if you get what I mean), but if there are any difficulties in removing it or if the pig wriggles terribly and makes it difficult to even consider attempting a safe removal, it would be advisable to ask the vet to remove it.