quick note on the eye dressing
by putting on two of them covering both eyes you do end up with a blind person but if you only put on on and there is something in the eye which may cause further damage with movement the eye will move about as they work in pairs (shine a light near one eye and the pupil will contract shortly followed by the other, if this doesn't happen something isn't right). The idea of covering both eyes is that the person wont try to look around and cause further damage until it's delt with by a pro. Of course when on duty we normally get them to hospital without too much trouble so you may have to decide that in a bushcraft setting the risk from them being without eye sight is more dangerous then the risk of damage to the eye.
I have had nasty eye injuries on a couple of occasions, the last time it was when someone let go of a branch rather than handing it to me, it swang back and hit me in the eye, under normal circumstances it wouldn't of been too nasty, however I was in Kenya and it was an acacia. I had 10mm of acacia thorn sticking out of my eyeball and a large amount of it embedded in it.
I was casevac'd to an area with guys from the RAMC, only once I reached the first line of aid did they cover both eyes, one of the reasons was depth of field, a person with binocular vision has full depth perception, someone with monocular vision cannot perceive depth in the same way. Things that seemed flat weren't and I found myself falling in holes that didn't appear to be there until after I fell in them.
If you take away full vision and effectively make them blind you do two things, firstly make them more careful (you feel with your hands and feet when you try to move), secondly you restrict their movement (people naturally feel uncomfortable if you take away their vision, they will naturally sit down and not move unless they really have to).
One of the side effects of covering both eyes was that the screaming headache that I was suffering from reduced to a dull throb.
There are a number of good reasons for covering up both eyes, not just damage limitation.
When the doctor removed the offending object from my eye he also put in Flourazine (sp?) which is both an antiseptic and an anasthetic. It also makes the scratches on the eyeball fluoresce, so he showed me my eye, it looked like the A-Z of London drawn with a fluorescent pen, with it being very bloodshot as well I could of got a part in a horror movie.
After that I wore an eye patch for a number of days (just till the eye healed sufficiently) and continued to fall in holes as a part of day to day life, but initially I wore it because the Flourazine being an anasthetic also kills the blink reflex of the eye for a period of time.