Ok without making it too icky,
The retina of the eye (internal lining of eyeball) can become weakened (e.g. thinner than usual) if a blow to the eye or head is sustained (I accidentally banged by head on a low stair).
As a result of the retina weakening it can become punctured allowing the fluids contained in the eyeball to seep out between the retina and the optic nerve/eyeball lining (second lining) the build up of fluid impedes the image quality leading to blurred vision (in my case) or the appearance of a cobweb/blotches/sparks etc.
If untreated the build up of fluid will remove greater amounts of the retina lining greatly reducing vision and the prognosis for recovery. (you could go blind in the affected eye.)
Treatment is by 'sealing the puncture with either laser surgery or cryo sumtinkwhatsit (technical term) which creates scar tissue over the puncture so sealing it.
A band may be inserted around the eye causing the retina to be pushed back on to the optic area, the band is integrated in to the eye with the passage of time, If successful. If not successful you go through excruciating pain until eventually the band pops out in to cornflakes on morning
.
Which is what I had done! with the Cryo stuff
or
The fluid in the eye is drained and replaced with a silicon oil or either of two gases, all of which create a bubble in the eye. 'Posturing' (sitting or lying in the same position for 50 minutes in every hour for a couple of months, you'd have to maintain the same position when sleeping too) is then used to position the bubble over the affected area, so physically pushing the retina back in to place.
Over time the gas is absorbed in to the body and the eye fluid replaces it self with the silicon oil I'm not too sure (I was vomiting at that point
).
Well that's how I understood it, but I'm not a Doc (and I was abit distracted about trying to maintain pole position on Crazy Karts
).
I had perfect 20/20 vision before so hopefully (fingers, toes and other bits of my anatomy crossed) I won't suffer too much vision loss (It'd obviously be worse if I wore glasses).