Sort of a Planet of the Apes problem of techno-man dropped in a primitive world.

My eyeglasses would cause consternation (at best).
Maybe I'd look for a clockmaker to see if I could get a job improving that technology and put my nearsightedness to use. Teach them about gears, ratios and springs. (I'm quite mechanically inclined.)

Then improve the lute and teach 'em how to rock and roll :-)
And start experimenting with firearms.

I think the actual outcome would be that I'd be dead of dysentery or cholera rather quickly. The King would eventually get my wristwatch. And my eyeglasses would be weighed against a duck to see if they were a witch....