My left eye makes me look like an alien because two days ago I awoke with a burst vein which covers all the white. The GP says it should not be anything to worry about, and gave me some dry-eye ointment.
That`s proaby a subconunctival haemorrhage. My mum gets them for no reason (although rumour has it they can be linked to high blood pressure which she has). It`ll probably take a week or more to clear. It`ll probably go yellow as it`s clearing. Maybe older people get them because their blood vessels are a bit thinner. They do look a bit scary though!
It isn't anything to worry about, I often get them, wear suglasses, I know it may be raining, so you will look like movie star, but don't walk into any lamp posts or you could end up with one red and one black! :-)