This is something that has been on my mind for a long time. Is it possible to spread disease by sharing an eyepiece? I volunteer at a nursing home and it seems like I get pink eye most years (I think a few times more then once in a year). I am leaning toward the affirmative answer myself. I am appalled at the thought of someone coming up to me while I'm observing and asking to have a look especially with the types of people around here. I don't just think about pink eye I'm also concerned about other diseases like aids and hepatitis and so forth. Thank God that we have already started getting rid of some unsanitary practices like bobbing for apples is now a thing of the past and more and more people are getting away from handshaking (disease & security). I am very surprised that I haven't seen this issue presented anywhere yet.