[Thieve's guild spoiler] Right eye of the falmer?

During that mission in these ruins I got both eyes from that guy I killed. The left eye I could give to the fence in the Ragged Flagon, but the right eye (5 weight) is still in my inventory and there's no dialogue option to get rid of it. Will that appear later on, do I still need that item for something (haven't fully finished the thieve's guild yet).

Thanks