As petitipilot said, don't lie and also provide all the medical files you have regarding the eye surgery and the lung infection.
For the first interview they will probably ask one or two questions about it but the guys interviewing you are pilots and not doctors. Saying that they will probably ask for all the information before letting you know about a second interview. So provide them with everything. Saves time later.
I forgot to provide some info for them regarding my medical condition (Not serious) but they needed to see it so they could assess the risk. This just added to the time I had to wait until I found out if I was successful or not for the first interview.
I was successful and the second interview was good. the medical part of the second interview was interesting. They wanted everything and anything. I had to get some more tests done in my home town and sent up to them before I heard back. They are thorough. (sp?)
Don't hide anything, they do find out.