Floaters can be normal and often come in spurts. It seems the inside of the eye can release cells as they are replaced.

Extremely nearsighted people tend to have more of them, as the eyeball is not round for them, but elongated. This puts more tension stress on the cells inside the eye. I have been warned by my eye doctor that any huge change in floaters should be checked by him, because they can herald a retinal detachment in some people, esp nearsighted ones as they age. So in seniors this is important.

When I was hypothyroid I had some hearing loss, which did get better. But my left ear is still less acute than my right.

I have very acute smell detection tho, always have. Never was affected by my hypothyroid, that I had for years. My husband still calls me the super sniffer! Women tend to have this tendency over males I have read.