I had a splash of water in my eye, which i do not believe was completely clean. i rinsed the eye thoroughly with water and put some regular eye drops in it. it happened half hour ago and as of now my eye looks normal. how long shall i watch ?

What you described does not seem to be a cause for concern. If the initial splash any chemical in it, that would have caused redness within minutes. If you are concerned about infection, that risk should pass in a couple of days. Leave it alone, interventions may complicate the issue of monitoring. Wish you good health.

What your describing does not sound concerning. As long as no new additional symptoms arise, you don't need to do anything more.