The concern that a lot of people have is with zoa's, some types contain a Palythoa toxin, that combined with the fact the eye is very vascular would concern me more. Something else to consider is that our tanks are not very clean, there could be a lot of different type of bacteriogical infections that could happen. If you can still see search the site and see what sort of issues people have had.
If vision becomes blurry or you fell like you are having heart issues I would make a trip to the ER.