As a child, measles, mumps and rubella were 'rites of passage' and although there can be serious complications, I personally don't recall anyone having had any lasting effects. I had all 3 while at primary school and I remember girls having 'rubella parties' to avoid catching it after puberty.
As for eye problems, I've had Posterior vitreous detachment (PVDs) in both eyes. Although one caused a small bleed, there was no sign of retinal detachment. My optometrist said that it was very common as you age (75% of over 65's) and in most cases caused no problems. I still get little 'floaters' which are annoying under certain light conditions.