Retinal detachment is the separation of the outer retinal pigment epithelium from the inner neurosensory-retina. When the force which holds the retinal attachment fails, fluid accumulates in the subretinal space causing the separation (1).
Luckily a sympathetic local eye surgeon gave me the all clear to jump on the earliest plane out and get back to Australia (and affordable health care). But I was beyond cryo and a bubble. I needed to be rid of all that sticky vitreous that was pulling off my retina. The operation's called a vitrectomy. Not pleasant. It leaves you effectively blind in that eye for a couple of weeks until it settles down and then the usual period of readjustment to an eye which sees the world in a different way. The no fly rule lasted even longer, but by this time the airlines (if not me) had learned to cope with their reduced load factor.