My dad done eye surgery by government camp. He had vision problem. So he did eye surgery for vision. That  is hand surgery not a laser. It's been 3 month.  Doctor said , he have stitch knot in eye and  have sore in upper eye. Still now he using eye drops . But that knot fall down. Please suggest what to do now? He feeling sooo disturb. He can't able to be normal. He getting some irritation without eye glass . He always using coolers. And his vision is good. But that knot is still on the eye.