I figured this went here.

I woke up this morning and my right eye has a dull, stinging sensation and it has been like this all day. Any idea what this could be?

It could be a lot of things.

Maybe you scratched it somehow. Maybe you strained it (can happen if you look through the wrong glasses.) Maybe a vessel is clogged behind it?

I dont know... but it started all of a sudden and wont stop. GOD ITS ANNOYING!!!