Suggest Remedy For Temporary Loss Of Color Recognition

i had my head down and my eyes closed. i work nights and was on a break and wanted to catch a little nap. When I opened my eyes, I could see no color in my right eye. Everything was like a photo negative, i the area around my eye felt just strange. It took about a full minute for my vision to return to normal. that minute felt like a forever! the area still feels stange.