Hello @aavhad and welcome to Mayo Clinic Connect. I see you are looking for some information on false positive. I did a search to see if I could provide any helpful information you may wish to consider and came across the information below.

It is a bit of a heavy read given the research nature of the article, so I pulled out an excerpt that I thought may be helpful for you.

From article:
In realistic settings of low risk of TB infection, even with high cutoffs and confirmation, the post-test probability of a positive QFT test on serial testing may still only approach 60%, while annual testing with a single QFT using the recommended diagnostic cutoff may cause over 25% of individuals to have a false-positive test over a span of ten years.

Serial testing for latent tuberculosis using QuantiFERON-TB Gold In-Tube: A Markov model:
https://www.nature.com/articles/srep30781
Does this resonate with you?

I'm curious to know what they diagnosed you with concerning left eye blurry? My 8 yr old daughter has the same thing going on with her same eye drop meds and she also had a positive tb test.

@aavhad I believe a person can get NTM in the eyeballs… I don’t know much about it, but skimmed over an article a few days back…