My eye is red and it feels like someone punched me in the eye. what is it?

Dry Eyes/MGD Likely: Dry eyes ; mgd meibomian gland dysfunction most common cause for red eyes and eye discomfort. There are many therapy options: best to start naturally (warm compresses, diluted baby shampoo scrubs) ; artificial tears ; move up a "ladder approach" to antibiotic cream, otc artificial tears. More info at: http://eyedoc2020.Blogspot.Com/2013/04/best-step-ladder-approach-to-dry-eye.Html i hope it helps!