The Islamic prophet's foreknowledge of the Terfeziaceae's health benefits

[R00tKiT]

So, the only way to learn that truffles help eye infections is if god tells someone. So that means the scientists who wrote those papers must also have been told by god.
If you say, "No, the scientists learned about this by doing it.", then it would stand to reason that at some point in the past (not really all that long ago if the hadith date is to be believed) someone else learned by doing it also.
The hadith wasn't a prediction of the future, but the recording of a discover, albeit with an unnecessary supernatural twist.

Microorganisms were discovered for the first time in the 17th century, almost one thousand years after Muhammad's death, and almost 800 years after Al-Bukhari compiled his famous hadith collection. There is no way anyone back then could have investigated some antimicrobial effect of truffles.