It actually does not look like a retained eye cap, it looks like damage to the living lens.
Take to a REPUTABLE reptile vet. Not a vet who occasionally sees a reptile. An opthalmic antibiotic will most likely be prescribed. In the meantime, remove all bedding and put the animal on paper towels.
If it is a damaged lens I've never seen one successfully healed. I've never seen an animal with a damaged living spectacle not lose the eye. Oftentimes, the next shed can tear the crust off. I've has some success using artificial tears to keep the scab moist when it goes into shed. Once the spectacle lens is removed the cornea becomes extremely susceptible to damage.