They need to be kept separated you will need to pick up a temp cage, it doesn't have to be big, in fact we suggest small cages for hospital cages to limit their activity until fully healed.
I would take both in for wellness exams and fecal tests. Going after a cage mates tail can be a visual sign the other is ill or has parasites.
I would also suggest getting some vetericyn vf to spray on the scratched eye.
https://www.amazon.com/Vetericyn-Wound-Skin-Care-Spray/dp/B006UJGZNG
I recommend ALWAYSSSSSSSS having vetericyn vf on hand! It's safe on eyes, and safe if they ingest any from grooming. It works great for scratches on the eyes and nose and neck wounds.