Can only agree with m0use and brazilianguy.
Looks like thrip damage.
Spidermites create lots of tiny dead dots and russet mites will make the leaves taco a bit and get a bit wrinkly.
Thrips eat tiny patches like this and you must have quite an infestation for it to look like this.
Check in the leaf veins if you see tiny brown or black bugs running up and down it.