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Does look like leaf rollers. Easy enough to determine--unroll a leaf and, if that's the problem, you will see them. I always clip off any affected leaves and spray the rest of the plant with an insecticide. Just to be on the safe side, I take all the leaves I clip off and put them in a Zip Lock bag before I throw them in the trash.
I don't know of anything that causes that besides the leafrollers--did you just look at one leaf or did you look at a bunch of them Could be a few of the rolled leaves have been abandoned. I'm also not sure if they stay in the leaves all the time or if there's a certain time of day that you need to look. Try googling leaf rollers or leaf roller caterpillars, I'm sure there's a lot of info out there about them.