I did M.S. in Electrical engineering from a U.S. university. I did not apply for OPT after masters. I enrolled for PhD in the same university but now i am thinking of converting it into second Masters. Will i be eligible for Masters OPT now as i did not apply for it earlier?
Talk to your DSO as soon as you can – it can be difficult to get a second masters OPT, as this link shows http://redbus2us.com/after-second-masters-ms-mba-in-usa-do-you-get-opt-for-one-year/ - but, as the area is complicated you should speak to the adviser so you can make sure you are going down the right path. It is never too late to change your mind, but it can get complicated. Good luck!